162 MESSRS. W. WEST AND G. 8. WEST ON 
MICRASTERIAS, 4g. 
26. M. Most, nob. 
Euastrum verrucosum, Ehrenb. var. Mobi’, Borge, in Bihang K. Sv. 
Vet.-Akad. Handl. xxii. no. 9, p. 13, t. 2. ff. 18, 19. 
E. verrucosum, forma, Mob. Austr. Süssw, Alg. ii. p. 340, t. 2. f, 21. 
Var. RrpLEYI, n. var. (Pl. 9. fig. 2.) 
Var. major, semicellulis eum lobo polari altiori et convexiori 
(sed in medio leviter retuso), ineisurá infra apicem latiori et 
minus profunda, lobis lateralibus minus productis, sinu valde 
aperto extrorsum ; membrana scrobiculata, serobieulis in centro 
multe majoribus. 
Long. 135 p; lat. 102 p; lat. apic. 76 u; lat. isthm. 36 p; 
crass. 57 p. 
We do not consider that the var. Mohii, Borge, of Euastrum 
verrucosum belougs to that genus, much less to that species. 
The polar lobe is that of a Micrasterias and not that of an 
Euastrum. The characters of M. Möbii are so different from 
those of E. verrucosum that we fail to see how it came to be 
placed under the latter species. 
The variety seen by us was scrobiculate and not granulate, the 
scrobiculations being much larger in the centre of the semicells; 
Borge describes his specimens as granulate. The magnifications 
of Borge's figures (7. c.) are incorrect, as proved by his measure 
ments in the text. 
27. M. anomata, W. B. Turn. in Vet.-Akad. Handl. xxv. no. 5, 
(1893) p. 97, t. 22. f. 1. 
M. apiculata, Menegh. forma, Joshua, in Journ. Linn. Soc. (Bot.) xxi. 
(1880) p. 636, t. 92. f. 13. 
M. apiculata forma Joshue, Toni et Levi, in Notarisia (1886), p. 91. 
Long. 218 u; lat. 150 p ; lat. isthm. 44 u. Lat.: long.—1: 145. 
» 27; , l60p; ,, » 40 p. sio» =1: 142 
(PI. 9. fig. 1.) 
The specimens observed of this fine species were rather large 
ones and were much more regular in form than Turner’s figure 
the polar lobes have a distinct subrectangular basal portion 
which causes them to be more produced, the lateral divisions are 
less deep and the sinus is more open. These characters, howeve" 
are not of varietal importance, because, judging from Turner's 
figure of the typical form (J. c. fig. 1 a), we should imagite that 
