238 NOTES ON JAPANESE DESMIDS. 
the opening rectangular, the spines stouter, and forming a con- 
eee of the slightly « curved sides in front view. Long., without 
spines, 20 »; with spines, 87 »; lat., without mere 23 p; 
spines, 28 py; isth. 7 w. Fig. 12. Junsai numa 
10. ~ en — Junsai numa. 
B. & , new var. — Differs from the type in being dis- 
tinetly, poeier’ sninataly, _ oro Long. 88-88 p; lat. 87 p; 
lat. of isth. 12». Junsai num 
a1. 6. ‘oxyrhynchum, n. — Small; length and pote 
wards; surface songhty rugose, with one urved rows of cleft 
a on ay ends, giving them a strongly crenulated appear- 
end vi triangular, with straight sides, the angles terminated 
angle to angle. Isthmus one-third of res breadth of the semicell. 
Long. and lat. 80 »; isth. 10». Fig. 6 
unsai numa. 
12. S. cuspidatum Breb. Junsai numa. 
18. S. Avicula Breb. ie — 
14. 
arcuatum Nordst. 
15. S. tunguscanum Boldt ii Cc. a 114. “Tab. v., fig. 22). Junsai 
a. 
16. S. bifidum (Ehrb.) Breb. Junsai numa. 
17. 8. brachiatum Ralfs. Junsai numa. 
18 J sal ‘ 
9 
21. S. subteliferum, n. sp. — — Medium- sized, slightly longer 
than broad: semicells in front view regularly oval, with three stout 
le is a cirele of nine vhcasraate spines, aides concave ; aa 
striction or Opening out widely. Membrane smooth. ‘Lon 
37 »; lat. 85 »; lat. of isth. 13». Fig. 1 
nsai n Rona 
pretty species has a certain amount of resemblance to 
8. teliferum Ralfs, but differs essentially in the two sizes of spines, 
as well as in the form of the semicells. From S. setigerum Cleve 
oe Royanum ree! —— also has spines of two sizes, it 99 
in being a , in the form of the semicells, both in 
front and end view, fe totally j in the number and arrangement of 
the | spines. 
—— sum Breb. J numa. 
25. S. submon ticulosum, n. sp. — Small, about as long a8 
—— y oval, with the end rounded, constriction 
iallow, 
at first. straight, then abruptly rounded into a short stout 
