214 MESSRS. W. WEST AND G. S. WEST ON 
Fig. 34. Cosmarium Pseudoscenedesmus, sp. n. Xx 520. 
35. » Regnesii, Reinsch, var. productum, var. n. x 520. 
36-38. e sulcatum, Nordst., var. incrassatum, var. n. x 520. 38, zygospore. 
39, 40. hs trachypolum, West & G. S. West, var. elongatum, var. n, x 520. 
41. e dorsogranulatum, sp. n. X 520. 
42. 5 globosum, Buln., var. Wollei, West & G. S. West, forma. x 520. 
43-45. pseudoconnatum, Nordst., var. ellipsoideum, var. n. x 520. 
PLATE 21. 
Fig. 1. Cosmarium medioscrobiculatum, sp. n. x 520. 
3 Pardalis, Cohn. x 520. 
3. Si decoratum, West & G. S. West, var. dentiferum, var. n. x 520. 
4. D Pseudobroomei, Wolle. x 520. Two forms. 
5. is biscrobiculatum, sp. n. x 530. 
67. s pterophorum, sp. n. 6, x 830; 7, x 520. The elongate projection from each 
side of the vertical view (7 b) has been accidentally omitted from the drawing. 
'The lettering of the front and lateral views should also be interchanged. 
8-10. S Freemanii, sp. n. X 520. 
H. 5 cuneatum, Joshua. x 520. j | 
12, 13. 3 spinuliferum, sp. n. x 520. j 
14, 15. CH ceylanicum, sp. n. x 520. i l 
16, 17. Staurastrum unicorne, W. B. Turn., var, ceylanicum, var. n. x 520. 17, abnormal result of ] 
division. 
18. i alternans, Bréb., var. divergens, var. n. x 520. 
19. e villosum, sp. n. x 520. 
20. » giganteum, sp. n. x 520. 
21. » Freemanti, sp. n. x 520. 
22. D i var. triquetrum. x 520. 
23. » heneratgodhense, sp. n. x 520. 
24. » quadricornutum, Roy & Biss., var. patens, var. n. x 520. 
25. » gemelliparum, Nordst. x 520. | 
26. » tohopekaligense, Wolle. x 400. From an original specimen received from the 1 
late Rev. Francis Wolle. | 
27. j tohopekaligense, Wolle, var. trifurcatum, West & G. S. West. x 520. One. 
semicell possesses 3 processes in the inferior whorl and the other 9 processes 
in the inferior whorl. 4 
28. i tohopekaligense, Wolle, var. insigne, var. n. x 520. 
29, 30. » leptacanthum, Nordst. x 520. Two sizes of individuals. 
31, 32. » zonatum, Bórges., var. ceylanicum, var. n. X 520. 
33. » pinnatum, W. B. Turn., var. subpinnatum, nob. x 520. 
34. j sexangulare, Rabenh., forma. x 520. : 
35. = Ee var. subglabrum, var. n. X 520. 
36. »» biordinatum, sp. n. x 520. 
PLATE 22. 
Fig. 1. Staurastrum acanthastrum, sp. n. X 520. 
2. Wm ceylanicum, sp. n. X 520. 
