456 Wisconsin Academy of Sciences , Arts , and Letters. 
Because this species has been found but once since it was 
first described by Reinsch in 1877, and because the original 
description was based on a single specimen it might be placed 
among the doubtful species. 
GEOGRAPHICAL DISTRIBUTION 
Cape of Good Hope (Reinsch, 1877). Germany (Lemmermann, 
1893A). 
forma brevior West. 
W. West, 1893, p. 100; PL CCCXXXIII, Fig. 13. Balsamo, 
1900, p. 266. Brunnthaler, 1913, p. 166, 170. 
“Forma cum cellulis brevioribus quam forma typica. 
Long. cell. (C. spin.) 10 p. long. cell. (s. spin.) 8 p. lat. 
cell. 5 p.” 
The form brevior was reported from Scotland. 
14. S. acutiformis Schroder. (PI. XXVI: Figs. 28-29. 
PI. XXIX : Figs. 84-89.) 
Schroder, 1897G, p. 45; PL II, Fig. 4. Levander, 1899, pp. 63, 
70, 80, 90. G. S. West, 1899, p. 221. Borge. 1901B, p. 13. West 
and West, 1901B, p. 121. West and West, 1902A, p. 182. West 
and West, 1902B, p. 64. Snow, 1903, p. 391. Lemmermann, 
1904A, pp. 40, 70. G. S. West, 1904B, p. 221. West and West, 
1905, p. 270. Hardy, 1906, p. 38. Borge, 1907A, p. 57. G. S. 
West, 1907, p. 138. Adams, 1908, p. 35. Lemmermann, 1908A, 
p. 167. Lemmermann, 1908E, p. 405. Borge, 1909, p. 16. G. S. 
West, 1909A, pp. 29, 38. Gugliemetti, 1910, p. 31. Bachmann, 
1911, p. 191. Brunnthaler, 1913, pp. 168-171; Fig. 13. Chodat, 
1913, p. 23. 
5. hystrix var. acutiformis. Chodat, 1902, p. 215; Figs. 139B- 
139G. Heering und Homfeld, 1904, p. 83. Migula, 1907, p. 657; 
Pl. XXXV (L), Fig. 5. Bernard, 1908, p. 184; PL XIV, Figs. 
438-447. Bernard, 1909, p. 78; PL VI, Figs. 168-170. 
S. hystrix forma acutiformis. Volk, 1905, p. 64. Selk, 1907, 
pp. 57, 64. 
S. hystrix forma acutiformis cohaerens. Selk, 1907, p. 6. 
Coenobia 2-8 cellularum, cellulis fusiformibus. Mem- 
branae cellularum terminalum visae ab polo longitudinaliter 
costatae cum quatuor costis, cellulae interiores cum duabus 
costes. Dimens. cell. 5.5 x 16, 5.5 x 17, 6 x 18, 8 x 22 p. 
