17 
the other, furnished with 2 or 4 vibratile cilia, often germinating in 
_ the mother-cell without sexual fertilization. Macrogonidia much 
smaller, of similar form, furnished with two cilia at one extremity. 
_ Both kinds of zoogonidia produced within the cells of the threads, 
_ emitted either by a poriform opening in the mother-cell, or by the - 
_ Slitting or breaking up of the mother-cell.—Cooke’s British Fresh- 
ge, 178. 
, Water A] 
HORMISCIA, Ares. 
Articulate thread fixed by the basal cell, which is attenuated 
downwards; simple, or now and then emitting branchlets. Cells 
_ abbreviated, enclosed by a thick cell-membrane, which is often mani- 
_ festlylamellose. Cell-contents green, parietal, including an amylaceous 
 Sanule. Propagation by macrogonidia and microgonidia.—Cooke, le. 
The filaments are sometimes cylindrical, sometimes torulose like a 
tosaty, In consequence of the barrel-like inflation of the separate 
cells ; sometimes stretched out, sometimes frilled and interlacing each 
; other, with a relatively thicker stratified membrane. Vegetative or 
orn groups projecting from the mother-ce!ls.—Cooke, L.c. 
- Moebius says:—‘“ The species of Hormiscia are difficult to 
tereral —— 
lonper Collections may be referred to two types —namely, those wit 
cells and thin walls, and those with shorter cells and thicker 
Hei distinguish them as” :— : 
pea tilis, (Kuetz.) De Toni, M. Mocbius then proceeds :—“ The 
e a, of the threads changes according to the relative length of 
. and the condition of the chromatophore, since the latter 
3 I can, however,. lay no weight upon this distinction, 
"MM not sure that the alcohol has preserved the original 
