1909] Collins,— New Species of Cladophora 19 
grow and divide, the terminal cells being considerably more slender 
than the others, but much larger than those of the erect filaments. 
C. graminea n. sp. Frondibus caespites laxos formantibus, 10-15 
cm. longis, cartilagineis, prasinis; filamentis primariis 300 и diam., 
distanter di- trichotomis; ramis omnibus erectis, ramulis ultimis 
100-150 x diam., apicibus obtusis vel subacutis; cellulis inferioribus 
praelongis, ad 30- -plo longioribus quam crassis; superioribus breviori- 
bus, eis ramorum ultimorum diametro 4-6-plo solum longioribus; 
cellula singula normaliter spatium inter dichotomias proximas occu- 
panti; membrana cellulari plerumque valde striata. 
г Fronds. forming loose tufts, 10-15 em. long, cartilaginous, dark 
green; main filaments 300 ø» diam., distantly di- trichotomous; all 
divisions erect, ultimate divisions 100—150 y diam., tips blunt or slightly 
acute; cells very long, up to 30 diam. below, shorter above, in the ulti- 
mate branches 4-6 diam., each cell normally occupying the space be- 
tween two successive forkings; cell wall usually strongly striate.— 
Monterey to San Pedro, California. E 
Distinguished from all our other species by the long cells, each 
normally extending from one forking to the next; in this it agrees 
with C. pellucida (Huds.) Kütz. of Europe, but in the latter there is 
more reduction of size in the successive orders of branches, the main 
filament being sometimes as large as 500 у diam., while the ultimate 
ramuli are seldom over 50 џ, and are dense and more or less fasciculate. 
In C. graminea there is comparatively little diminution in size, and 
the tips are loose and open. In C. pellucida the divisions of the di- 
or trichotomy are usually equal and develop equally; in C. graminea 
one is often much reduced, sometimes being only a single cell. ‘The 
original specimen was sent the writer by Mrs. A. E. Bush, under 
the name of С. cartilaginea (Rupr.) Harvey, and there is a certain 
similarity of habit; but Ruprecht's Conferva cartilaginea is not a 
true Cladophora, and probably should be placed in Spongomorpha. 
Mrs. Bush's specimen, in herb. F. S. C., is the type of C. graminea. 
C. constricta n. sp. Fronde dense caespitosa, ad 10 cm. alta, sub- 
fastigiata; filamentis primariis ad 65 и diam., ramis minoribus, ramu- 
lis ultimis circa 25 и diam.; cellulis diametro 5-20-plo longioribus, 
plerumque leviter clavatis, frequenter constrictionem annularem dis- 
tinctam paulo super basin exhibentibus.  Ramificatione plerumque 
opposita inferne et saepe superne, saepe etiam laterali, ramulis brevi- 
bus subsecundatis; ramis et ramulis primo subpatentibus, mox sursum 
curvatis; apice cellulae terminalis breviter conicali- rotundata. 
Frond densely tufted, up to 10 em. high, somewhat fastigiate; 
main filaments to 65 n dan branches smaller, ultimate ramuli about 
