122 
BRITISH DESMIDS. 
Tetrachastrum oscitans. (Hass.) Dixon , in Nat. Hist. Rev. ( 1859), 
VI., p. 465. 
{Micrasterias oscitans. Ralfs.) 
Tetrachastrum pinnatifidum. (Kutz). Dixon, Nat. Hist. Rev. (1869) 
vi., 455. 
( Micrasterias pinnatijida. Ralfs.) 
IHicrasterias Thomasiana. Archer, in Micr. Journ. (1862), n , p. 239. 
Featherbed Mountain. 
Micrasterias angulosa. Hantsch, in Rabh. Alg. Eur., No. 1407. 
Archer, in Micr. Journ. (1876), xvi., p. 109. 
Co. Westmeath (Ireland). 
Euastrum circulare. Hassall, I. W. Algee (1845), p. 383, t. 90,/. 5. 
Ralfs’ Desm., t. 14, f. 3 a. 
Euastrum sinuosum. Letiomn. fide Ralfs Archer , in Pritch. Inf. (18Q1), 
3>. 729. 
Euastrum circulare , var. jj. Ralfs’ Desm., t. 13, f. 5, a, b, d. 
Euastrum Jenneri. Archer, in Frit. Inf. (1861), p. 729. 
Euastrum circulare , var. y. Ralfs’ Desm., t. 13, f. 5, c. 
Euastrum binale. (Turp.) Ralfs. Desm. var. angustatum. Wittr., 
Sotv. A Ig, t. 4. f. 8. 
Archer, in Micr. Journ. (1873), xiii., p. 315. 
Ireland. 
var. insulare. Wittr. Sotv. Alg. t. 4, f. 7. 
Archer, in Micr. Journ. (1873), xiii., p. 315. 
Ireland. 
Cosmarium undulatum. Corda Almanac de Carlsb. (1839), p. 243, t. 
5, /. 26. 
Archer, in Prit. Inf. (1861), p. 732. 
Cosmarium pygmaeum. Archer, in Micr. Journ. (1864), IT., 174. 
Dublin Mountains. 
Cosmarium exiguum. Archer, in Micr. Journ. (1864), IV., p. 178. 
Dublin Mountains. 
Cosmarium tuberculatum. Archer, in Micr. Journ. (1862), n, p. 247. 
Piperstown Road, Co. Dublin. 
Cosmarium tetragonum. (Nag.) Archer, in Prit. Inf. (1861), p.732. 
( Euastrum tetragonum. Nag.) 
Archer, in Mic. Journ. (1877), xvii., p. 102. 
Rocky Valley, Toole’s Rocks, Connemara (Ireland). Scotland. 
Cosmarium Brebissonii. Jacobsen, Desm. Denm.,t. 7., fig. 15. not Ralfs. 
Archer, Micr. Journ. (1877), xvii., p. 305. 
Co. Carlow (Ireland). 
Cosmarium Fortianum. Archer, in Prit. Inf. (1861), p. 733. Micr. 
Journ. (1860), p. 235. 
= Cosmarium orbiculatum. DeBary Conjug. (1858), t. vi., 
f. 49, a, b. = Cosmarium pseudomargariti ferum. Reinsch. 
Dublin and Wicklow Mountains. 
Cosmarium DeBaryi. Archer, in Prit. Inf . (1861), p. 735. 
( Plturotenium cosmanoides. DeBary.) 
