NOTES ON JAPANESE DESMIDS. 287 
I have found a specimen of R. hamosus Gen., gathered at Dore 
ton, Yorkshire (August 5th, 1865), and given as R. cordifolius to 
Déségli lise by Baker, and by him to Génévier. It belongs to the 
rst “division of his Discolores, but seems to me, as Baker also 
believed, more nearly allied to R. rhamnifolius 
Baker’ s Surrey &. thyrsoideus is R. nemophilus Rip., according 
to Génévier. 
NOTES ON JAPANESE DESMIDS.—No. I. 
By Joun Roy ann J. P. Bisset. 
(Concluded from p. 196). 
V. Sravrastrum Meyen. 
1. S. Bieneanum Rabenh. Junsai numa. 
2. S. orbiculare (Ehrb.) Ralfs. 
& elevatum Nordst. Junsai n 
- DEPRESSUM, new var.—Small, 2 Capt Long. 22 p: lat. 
20 p; “Aeth; 6p. Fig. 14. Junsain 
. glo sien . sp. — La sec one and a half times longer 
than ‘broad: semicells nearly circular, with a very broad isthmus, 
constriction acute, opening very widely; vertical view triangular, 
the angles very broadly rounded, and sides slightly concave. 
aoe aloud punctate. Long. 80-85 »; lat. 55-57 p; lat. 
of ist 30-82 p. Fig. 8. 
5. 8. leptodermum idl. Sones satin 
6. e brevispinum Bre Dae Meee 
minor Rab. Long. 40 p; lat. ; is uma. 
7. eudoc Sent n. sp. — es — Sm 5 “boat on es third 
longer chee Deck, constriction deep, forming a nearly 
Opening; semicells oval, terminated at each sai by a heat slightly 
incurved spine ; end view triangular, the angles terminated by a 
a spine, sides very slightly concave ; isthmus ros og 
very wide. mbrane minutely pun unctate. Long. 85 p; lat., 
fig.8. spines, 27 »; do., with spines, 35 p; lat. of sth 7 pe 
ies 
8. 8. "laden Breb. Junsai eer 
B. apiculatum Breb. Junsai n 
9. S. connatum Lundell (S. agehiiay Y aes tum Ldl.). | Junsai 
numa. This form, common in many parts of the world, ud 
opel bile aintaining its distinctive area seems well entitle 
o rank as a distinct s 
f. REcTANGULUM, ener — This var — from the type — 
having the sides very slightly convex sdddond be ' sharply rounded, 
