Tetraedron] xiv. PALMELLACEiE (West). 365 



HuiLLA. — In uliginosis editioribus prope Humpata, Empalanca et 

 Lopollo ; May 1860. No. 15. 



4. T. pusillum W. et G. S. West in Journ. Bot. 1897, p. 237. 

 Micrasterias pusilla Wallich in Ann. Mag. Nat. Hist. ser. iii. 



vol. V. 281, t. xiii. fig. 13 (1860). Staurophanum jnisillum W. B. 

 Turn, in K. Sv. Vet.-Akad. Handl. Bd. 25, no. 5, 159, t. xx. f. 22 

 (1893). 



Var. ang-olense W. et G. S. West in Journ. Bot. 1897, p. 237. 



LiBONCo. — Ad margines flum. Lifune; Sept. 1858. No. 304. 



We see no reason for Turner's genus Staurophtnum, as no clear 

 line of demarcation can be drawn between those species which it 

 would include and those referable to Tetraedron. Indeed Tetraedron 

 2nmUum is very closely connected through its var. angoleuHe with 

 T. hihulatum (Niig.) Hansg. 



5. T. regulare Kiitz. Piiyc. Germ. 129 (1845); W. et G. S. 

 West, I.e. 



Polyedrium tetraedricum. Nii?. Gatt. einz. Alg. 84, t. iv. B, 

 %. 3 (1849). 



PuNOo Andoxgo. — In stagnis prope Anbilla (Condo) ; March 1857. 

 No. 177. 



Forma viajus Eeinsch in Abliandl. Naturhist. Gesellsch. Nlirn- 

 berg, Bd. 3, H. 2, 77, t. v. fig. 2 (1866) ; W. et G. S. West, I.e. 



LiBONGo. — Ad margines flum. Lifune ; Sept. 1858. No. 204. 



7. BOTRYOCOCCUS Kiitz. (1849). 



1. B. Micromorus W. et G. S. West in Journ. Bot. 1897, p. 238. 

 LiBOXGO. — Ad margines flum. Lifune ; Sept. 1858. No. 204. 



8. OOCYSTIS Nilg. (1855). 



1. 0. Novae Semlise Wills in Of v. Kongl. Yet.-Akad. Forhandl. 

 1879, no. 5, 26, t. xii. f. 3; W. et G. S. West, I.e. 



HuiLLA.— In paludibus exsiccandis ; April 1860. No. 176. 



Var. maximum West in Journ. E. M. S. 13, t. ii. f. 25 (1894); 

 W. et G. S. West in Journ. Bot. 1897, p. 238. 



This is yet a larger form than the British one. 



Gfn.uxGO Alto. — Ad margines stagnorum rivi Quango ; Aug. 1857. 

 No. 155. 



2. 0. solitaria Wittr. in Wittr. & ISTordst. Alg. Aq. Dulc. 

 Exsicc. Fasc. v. no. 244 ; Bot. Not. 1879, 24; W. et G. S. West, 

 I.e. in Journ. Bot. 1897, p. 238. 



HriLLA. — In uliginosis editioribus prope Humpata, Empalanca et 

 Lopollo : May 1860. No. 15. 



LiisoxGo. — Ad margines flum. Lifune ; Sept. 1858. No. 204. 



Forma major Wille in Ofv. Koniil. Vet.-Akad. Forhandl. 1879, 

 no. 5, 26 ; W. et G. S. West, I.e. 



Hrii.i.A. — In paludibus exsiccandis ; April 1860. No. 176. 



9. ATHROOCYSTIS W. et G. S. West in Journ. Bot. 1897, p. 238. 

 1. A. ellipsoidea W. et G. S. West, I.e. 



