IQI0.] N. ANNANDALE: Phylactolematous Polyzoa. 43 
present ; ectocyst lightly pig- 
mented ; statoblasts elongate P. fruticosa. 
3. Zocecia and ectocyst as in 2; 
free statoblasts broadly oval P. repens. 
4, At any rate the older zocecia en- 
tirely recumbent, sometimes 
with the aperture on the dorsal 
surface, with a triangular col- 
ourless patch at the tip of the 
same surface; the ectocyst 
of the basal part of the zoce- 
cium densely pigmented ; 
free statoblast elongate .. P, emarginata. 
5. All or nearly all the zocecia with , 
their bases recumbent but 
with their distal part free and 
turned upwards ; the ectocyst 
of the basal part translucent, 
roughened on the surface, that 
of the distal part colourless and 
smooth, the colourless part 
frequently passing into the col- 
oured part in the form of a V ; 
free statoblasts very variable 
in shape ae .. P. allmant. 
Group Il. (Philippinensis group.) 
Ectocyst rigid, deeply pigmented, 
tip of the zocecia abruptly trun- 
cated when the polypide is re 
tracted. 
Zocecia irregularly but strongly 
annulated ; with a strong fur- 
rowed keel on the basal part ; 
free statoblast elongate .. P. bombayensis. 
Group III. (Punctata group.) 
Ectocyst soft and flexible, much 
swollen; tip of the zocecia 
rounded. 
Ectocyst colourless ; zocecia with- 
out a furrow; statoblasts broadly 
oval, often asymmetrical in out- 
line a er .. P. punctata. 
a. Repens group. 
Plumatella repens, Allman (? Linné). 
? Tubipora repens, Linné, Syst. Nat. (Ed. x), 1758. 
Piumatella repens, Aliman, Mon. Fresh Water Polyzoa, p. 93, pl.,v, 
figs. r—8 (1856). 
