fi 17 
,. (species). —_ Prof. Moebius says :—“ Of other C£dogonia 
which I could not determine, I shall only notice one species found 
sterile on account of the peculiar form of its vegetative cells. The 
longitudinal walls are in this case slightly undulating in a different 
wa hose of CE. undulatim, while in every cell are present 4 
sharper and between them 8 shallower constrictions.” 
ts ea) collection, November, 1892, Dr. Thos. L. Bancroft. 
HORMOSPORA, Bréeb. 
Thallus tubular, gelatinous, swimming free. Cells oblong or 
oval, green, arranged in simple longitudinal series (families), either 
i ent 
H. transversalis, Bréd. " Cooke’s British Freshwater Alge, 22. 
a es slimy, equal, or, undulate; cells ovate-oblong of usiform, 
sposed transversely in a moniliform series; contents granular. Size: 
ae to H. t 
the diagnosis which the author gives for this species (Annalesdes 
uences Naturelles III., Sér. Botanique, T.I. p 
n : 
a described by later authors (De Toni’s Sylloge Algarum omits mh 
. . . : ns 
 Membran d . Seer . ha 
; hen e do not occur in the species treated of by Brébisson or bav® 
Ee eho overlooked. Of the alga in question I observed single 
From VOUS Substance forms a, small bend outwards; the iece extending 
D tas “pha is limited by two transverse lines, which s directly 
- Tinge the longitudinal axis of both the neighbouring oes; ; 
= appertains to the one, and the other to the other group © 
poe not be very precisely 
the cells canno pond of the 
