196 NOTES ON JAPANESE DESMIDS. 
26. C. depressum Bailey. Junsai numa. 
27. C. decachondrum, n. sp.—Small, subundulated, as long 
as broad, almost circular in outline, ends slightly truncate, re 
to which are a row of minute spines, of which 5-6 are visible in 
one on each side of the middle; end view elliptical, with ends 
Junsai numa. 
This species is near C. taxichondrum Lundell, f. prac ng 
Boldt; but that form wants the minute spines near the ends, an 
this wants the granule at the base, close to the isthmus, as well as 
e three parallel to the base on the middle of the semicell. A var. 
of it is a little more truncate. 
2 
8. C. pachydermum Lundell. Yokohama and Junsai numa. 
29. C. pseudopyramidatum Lundell. 
bsp. stenonotum Nordst. Yokohama. 
80. C eum Archer, Junsai numa 
31. C. Meneghinii Breb. J numa. 
2. C. moniliforme (Turp.) Ralfs. Junsai numa. 
33. C. connatum Breb. Junsa uma. 
84 cavatum Nordst. Junsai numa 
diagnosis of this fine species (‘De Desmid.,’ p. 58). 
Calocylindrus Cohnii Kirch. an Diophyntium tessellatum Delponte 
form apparently one species, and only differ from this in being non- 
punctate. 
IV. Arrsropesmus Ehrb. 
1. A. convergens Ehrb. Junsai numa. 
2. A. bifidus Breb. Junsai numa. 
8. A. octocornis Ehrb. 
- Ralfs. Junsai numa, 
(To be continued.) : 
