714 
Transactions of the Society. 
number of species on record. No species is here recorded for any 
locality in which it has been found previously; but almost every 
species recorded in the paper of Mr. Bissett and those by Mr. Bennett 
has been again seen from the same localities. 
The gatherings covered most of the Lake District proper, and 
Mr. W. H. Youdale kindly made a few gatherings for me from near 
Cocker mouth, Embleton, Crummock Water, and Bassenth waite 
Water. 
There are 589 species and 78 varieties in this paper, one genus, 
21 species, and 23 varieties of which are here described for the first 
time, and in addition to the latter, there are 27 species and 10 varieties 
recorded as new to the British Isles (prefixed by an asterisk). 
In the preparation of this paper — as in former papers — I have 
again to acknowledge the invaluable help of my son, Gr. S. West 
(National Scholar in Biology), who also assisted in making the 
collections from near Bowness. The locality “ Bowness ” includes 
pools near there with Nymphsea alba and TJtricularia , small pools 
with the latter on Brant Fell, and other suitable places as far as 
Lindeth where many gatherings were made. 
Fig. 23. — Cosmarium cymatonotopliorum sp. n. a, x 830 ; ci r , a", b, et c X 520. 
n 24. „ supraspeciosum Wolle var. emarginatum var. n. X 520. 
„ 25. — Staurastrum arcucitum Nordst. subsp. subavicula subsp. n. x 520. 
26. ,, Brebissonii Arch. var. brevispinum var. n. x 400. 
„ 27. — Arthrodesmus glaucescens Wittr. forma convexa West (c. zygosp.). X 520. 
28. — Staurastrum ellipticum sp. n. x 400. 
„ 29. — Cosmarium subcapitidum sp. n. X 520. 
„ 80. „ Clepsydra Nordst. X 520. 
„ 31.-' Cosmarium ochthodes Nordst. var. amcebum var. n. Verrucas x 830. 
v 32. „ microsphinctum Nordst. x 520. 
M 33. „ vexatum sp. n. X 520. 
34. — Staurastrum sexcostatum Breb. subsp. produdum subsp. n. x 520. 
35. „ polymorphum Breb. var. muniium var. n. X 520. 
36. „ gracile Kalfs var. coronulatum Boldt. f. 3-gona. X 520. 
M 37. „ Pseudosebaldi Wille var. simplicior var. n. X 520. 
M 38. „ v estitum Ralfs var. semivestitum var. n. x 520. 
,, 39. — Dimorphococcus lunatus A. Br. x 520. 
Plate X. 
„ 40-42. — Cylindrocapsa conferta sp. n. x 520. 
„ 43-46. — Tetracoccus botryoides gen. et sp. n. x 520. 
„ 47-48. — ,, „ „ Two groups of four cells, x 830. 
„ 49. — Nephrocytium lunatum sp. n. x 520. 
„ 50. — Selenastrum obesum sp. n. x 520. 
51 „ „ Two separate cells, x 830. 
” 52. „ „ „ X 520. 
53. — Tetraedron gig as (Wittr.) Hansg. var. mamillata var. n. X 520. 
J5 54. — Trochiscia uncinata sp. n. x 520. 
„ 55, — Chlorococcum regulare sp. n. x 520. 
„ 56 . — Oocystis elliptica sp. n. x 520. 
„ 57. — Schizochlamys delicatula sp. n. X 520. 
„ 58. — Lyngbya subtile sp. n. x 830. 
„ 59 & 60. — Chroococcus giganteus sp. n. X 520. 
„ 61-63. „ schizodermaticus sp. n. x 520. 
„ 64. — Ccelastrum sphzericum Nag. x 520. 
