Family EUNOTIEÆ. Epithemia turgida Kg. Common,-E. Westermanni Kg. C., S. -E. Sorex Kg. Cotterdale.-E. gibba Kg. C., S., Sc., Cotterdale. -E. ventricosa Kg. M., S., Lockton. E. Zebra Kg. C., Cotterdale.-E. rupestris Sm. S.-E. Argus Kg. M., Masham, Holwick, Cotterdale, S. Eunotia diodon Ehrbg. St.-E. tetraodon Ehrbg. St., Lockton. -E. Arcus Ehrbg. M., C., S., Goathland.-E. majus Sm. C., S., Se.-E. gracilis Ehrbg. Frequent.-E. monodon Ehrbg. M.-E. pectinalis Dillw. C., M., S.-E. undulatum (Sm.). Goathland.E. Soleirolii Kg. Cotterdale. Family CYMBELLEÆ. Ceratoneis Arcus Kg. S., Muker. Cocconema lanceolatum Ehrbg. Common.-C. cymbiforme Ehrbg. Common. C. parvum Sm. Encyonema prostratum Ralfs. Muker.-- E. caspitosum Kg. Romaldkirk, Rokeby. Amphora minutissima Sm. M., Staiths. A. ovalis Kg. Se., Sc., Whitby, Cotterdale. Family ACHNANTHEÆ. Cocconeis Pediculus Ehrbg, Frequent. -C. placentula Ehrbg. Masham, Se., S.-C. Thwaitesii Sm. C., M. Achnanthidium microcephalum Kg. Sc. Achnanthes exilis Kg. M. Rhoicosphenia curvata Rabh. Staiths, Holwick, Romaldkirk." Family FRAGILARIEÆ. Denticula crassula Näg. S. Odontidium hiemale Kg. M., Lockton, Sc.-O. mesodon Kg. Holwick, M. Fragilaria capucina Desm. Lockton, Egton, M., St., Sc.-Var. mesolepta Rabh. Lockton.-F. mutabilis Grun. Frequent. Diatoma vulgare Bory. Winch Bridge, Whitby, Lockton, M.D. elongatum Ag. Whitby, Winch Bridge, Sc. S. Synedra lunaris Ehrbg. Very common. Var. undulata Rabh. Goathland. S. falcata Bréb. C. S. pulchella Kg. M., River Ure.-S. minutissima Kg. Sc. -- S. Ulna Ehrbg. Common. delicatissima Sm. Sc., St. S. splendens Kg. Very common. Var. B. Sm. St.-S. obtusa Sm. Egton.-S. capitata Ehrbg. St. Asterionella formosa Hass. St., M., Romaldkirk. Family AMPHIPLEURA. Amphipleura pellucida Kg. Sc., M. Family NITZSCHIEÆ. Nitzschia Amphioxys Sm. M., River Ure, St., Sc.-N. parvula Sm. St., S., Marske.-N. sigmoidea Sm. Common. -- N. linearis Sm. Frequent. - N. tenuis Sm. Frequent.-N. minutissima Sm. Whitby, Se., M. -- Nitzschiella acicularis Rabh. M., Dalton, Whitby, Se. Family NAVICULEÆ. - Navicula cuspidata Kg. S., Sc., Se. N. rhomboides Ehrbg. Common.--N. serians Kg. St., M.--N. elliptica Kg. M., Se.--N. pygmæa Kg. Sc.-N. limosa Grun. M., C.-N. gibberula Kg. M. -N. inflata Kg. M.-N. Amphisbana Bory. Whitby, Marske, Sc., Se., St.-N. ambigua Ehrbg. St.-N. pusilla Sm. Whitby.- N. anglica Ralfs. Se., Reeth. N. rhyncocephala Kg. Reeth. N. affinis Ehrbg. Common. - N. Amphirhyncus Ehrbg. M., Se.N. producta Sm. Marske, St.-N. angustata Sm. M., Sc. - N. cryptocephala Kg. Very common. N. dicephala Ehrbg. M., Muker, Goathland, S.--N. binodis Ehrbg. Staiths, M. - Pinnularia nobilis Ehrbg. M., Se., St., C. - P. major Rabh. Frequent.-P. Rabenhorstii Ralfs. Levisham, Glaisedale, C., S.-P. Tabellaria Ehrbg. Lockton, S. P. gibba Ehrbg. Lockton, S., M.--P. lata Rabh. M., S. P. viridis Rabh. Very common. P. stauroneiformis Sm. Lockton, M. - P. oblonga Rabh. St., Se. -P. alpina Sm. M.-P. radiosa Rabh. Sc.-- P. viridula Rabh. P. Dactylus Ehrbg. M., S. P. acuminata Sm. Sc., C.P. acuta Sm. M.--P. mesolepta Sm. M.--P. cardinalis Ehrbg. C. -P. divergens Sm. M., Se., S. M. Frustulia saxonica Rabh., var. aquatica Rabh. M. - Sc.--P. Spencerii Sm. Reeth, M., Se., St. P. lacustre Sm. Se., S. anceps Ehrbg. M., Whitby, St. Pleurostaurum acutum Rabh. S. Family GOMPHONEMEÆ. Gomphonema tenellum Kg. Sc.-- G. dichotomum Kg. St., C.-G. capitatum Ehrbg. C., Se., S.-G. constrictum Ehrbg. Whitby, Staiths, Sc. G. geminatum Ag. Upper Teesdale. - - G. Augur Ehrbg. C.-G. acuminatum Ehrbg. M., Egton, S., Sc., Se.--G. olivaceum Kg. Sc.-G. intricatum Kg. S., M., C. Family MERIDIACEÆ. Meridion circulare Ag. Common.--M. constrictum Ralfs. C., S., Cotterdale. Family TABELLARIEÆ. Tabellaria flocculosa Kg. Common.-- T. ventricosa Kg. M., S., Sc.-T. fenestrata Kg. Cotterdale, M. EXPLANATION OF PLATE 291.-The letter "a" indicates a front view, "b": side view, "c" an end view (or from base of semicell). Figs. 15, 16, and 17 are to illustrate the article on 'The Fresh-water Algae of Maine' in this Journal for last July. All the figures have an amplification of 400 diameters. Fig. 1, Cosmarium eboracense, n. sp. 2, C. cyclicum Lund., var. angulatum n. var. 3, Penium Brebissonii Ralfs, with a parasite. 4, Cosmarium granulatum n. sp. 5, Tetmemorus granulatus Ralfs, an abnormal form. 6, Gonatozygon læve, n. sp. 7, Staurastrum acarides Nord., var. hexagonum, n. var. 8, S. acarides Nord., var. eboracense, nov. var. 9, Arthrodesmus bifidus Bréb., var. truncatus, n. var. 10, Staurastrum margaritaceum Meneg., an abnormal form. 11, A nine-ended form of the last. 12, S. avicula Bréb., var. aciculiferum, n. var. 13, A form of Micrasterias Americana Ralfs, var. recta Wolle. 14, Cosmarium lepidum, n. sp. 15, Micrasterias pinnatifida Ralfs, var. trigona W. West. 16, Staurastrum angulatum W. West, var. subangulatum W. West. 17, Sphærozosma Aubertianum W. West. CATALOGUE OF THE MARINE ALGE OF THE WEST INDIAN REGION. BY GEORGE MURRAY, F.L.S. (Concluded from p. 262.) GEOGRAPHICAL DISTRIBUTION. I have constructed the following tables in illustration of the distribution of the Algae occurring in the West Indian Region, since this form of statement is at once shorter and clearer than any other I could devise. The information thus conveyed will doubtless interest the reader more than any part of the present Catalogue, as it has so interested me in the making of it. It should be explained that, to ensure accuracy, I have revised the statements of the geographical distribution given under the species, with the result that in some cases this distribution appears to be wider, while in others I have found reason to doubt the statements of others and of myself, adopted in the paper, which assign a wider field of occurrence to these forms. The difficulty of giving an absolutely accurate rendering of the case is very great, owing to the much-scattered sources of information on the distribution of Algæ, and I have in all cases of doubt preferred to under-estimate the range of a species. While there are errors in the tables beyond all question, I may claim to have striven to reduce these to the lowest limit, and the work of doing this, of tracing particular forms into the different regions of distribution, and the labour of consulting the chaotic literature of distribution, must be my excuse, if such errors be deemed by any one to be unwarrantable. I hope I shall not be considered to be taking credit to myself in stating the matter thus, but that it will be understood as part of an apology. |