42 
GC. parvulum, Ney. “Ceils 9 » thick, 70 » long ; the zygospores 
observed) are globular (according to delineation in Wolle Desm. 
Pl. VIIL.; Fig. oe "Moebius. 
ab. urpengary, 7’ s. L. Bancroft. Also found in Europe North America, 
Greenland, i and ee Sandwich Islands. 
C. Ehrenbergii, Meneg. Cooke’s British Desm ids, Frond 
large, stout, alae five or six times as long as broad, lunate, parse 
tapering, upper margin very convex,- -lower concave with a conspicuous 
: : d 
inflated centre (92 p thick, 540 p long), I frequently found specimens 
which did not show this inflation, or only showed indications of it, and 
were consequently more nearly allied to C. Malinervianum, De Not. 
p thick, 400-570 p long, membrane smooth and colourless). 
As Warditional forms éxint: it seems to me better to wie it only as@ 
variety of be Ehrenbergii, as Rabeuhorst has also don 
Hab. : Burpengary, Thos. L. Bancroft. Also met with in ‘Bashpes North and 
South sa Jamaica, Japan, and New Zealand. 
-rof. Moebius says —C, Ehrenbergii is known in Europe, North and South 
a o. Zealand, and Japan; C. Malinervianum only in Eur ope.” He also 
C. moniliforme (Bary), Ehr., whose centre only very little inflated. This 
species very much resembles the foregoing, i. has smaller dimetisions, 36-55 pi 
rarely as much as 72 pt thick.” 
uetzingii, Bré). Cooke’s British Desmids, 34. “ In the 
centre 16 broad, thinned aw ay at the colourless ends to 2,8 much 
- ae » long, distinctly striated in the centre.’—Note of P 
e601 | 
Hab.: Burpengary, Thos. L. Sideort Also found in Europe, North 
America, Japan, and New Zealand. any 
Ehr. Cooke’s British Desmids. Frond “ 
beak, longer than the body, ultimately curved downwards, ends obtuse; 
eaten cree Ss . faint ; - : mp nm 
18-32 te Wie ae 0-11 » (W.).” : . : 
ier « @, living eel b, empty cell; c, formation of zygospo 
ae Sour “Benes, ¢ ious t4 Italy, aa eb the Cnited eb? i aie — 
Pp | 
Fro ne Sane straight, cylindrical, dips p lence ‘au , 
not at all constricted - buat pe T dightly pare tc owed a middle, | 
nati ‘ Endochrome with or without a Sat gin be vei a 
De ni | mele —Archer, in Pritch. Infus.; Co oke's a 
osterioides, Ruilfs. Cooke’s British soit Al. Frond 
miher large, about six . as long as Tord d, smooth, fusiform, 
neeolate ; ends broadly rounded; endochrome i in “distinct long! 
a 
