840 MR. A. W. WATERS ON 
elongate like the ovicell of geniculata, as figured by Busk and 
Harmer, and also as a specimen in my collection, Harmer 
considers that C. geniculata and C. cornuta must be separated, 
chiefly on account of differences in the ovicell, and although the 
present species is also allied there seem to be sufficient reasons 
for its separation. The C. crisidiodes Ort. has 2-3 zowcia to each 
internode, with three-jointed sete. 
Los. Wasin, Brit. E. Africa, 13 fath. (500), only one colony. 
Crista CIRCINATA, sp.n. (PI. I. figs. 7-9.) 
The zoarium divides into two main branches, and on each of 
these the fresh branches are mostly given off from the one side, 
and in the lower part of the zoarium the fresh branch arises at 
about the second zocecium, while in the younger part the branches 
start from about the fourth. The joints are light. The distance 
from zocecium to zocecium is about 0°27 mm., and the round 
zowcial aperture is about 0-08 mm. ‘There are fewer pores on 
the zocecia than in most Crisiw, and the zocecia extend free for a 
considerable distance. 
The ovicells, occurring just after a bifurcation, are large and 
erect, with the curved ocwciostome on the distal or dorsal surface 
of the ovicell, with the oceciopore only 0°05 mm. diameter. 
The ovicell of Crisia may appear to be central as in C. ramosa 
Harm., C. fistulosa Hell., etc., and is then long and pear-shaped, 
or it may appear to be at one side, and may be shorter, when 
we call it pomiform. There are others in which the ovicell is 
free, not being attached by its surface, and with the oceciostome 
on its dorsal surface instead of being directed forwards. Free 
ovicells occur in C. edwardsiuena VOrb., C. biciliata MacG., 
CO. howensis Maplestone. 
IT have felt much hesitation as to whether the form described 
is the Crisia cuneata Maplestone *, and it also has many points 
of resemblance with C. cylindrica Busk, but a different ovicell is 
figured. The Museum specimens (528, 853) of eylindrica have 
no ovicells. i 
Loc. Ras Osowamembe, Zanzibar Channel, 10 fath., only one 
specimen (504); Prison Island, Zanzibar Channel, 8 fath. (505) ; 
Brit. E. Africa, 10 fath. (520): collected by Crossland. 
ENTALOPHORA WASINENSIS, nom. nov. (Pl. II. figs. 1-4, 9; 
Text-fig. 1.) 
Entalophora deflexa Smitt, “ Floridan Bryozoa,” pt. i. p. 11, 
pl. v. figs. 28-30 (1872). 
As this does not seem to be the same as the small delicate 
British species known as deflewa Couch, I have given it another 
name. 
The specimens from Zanzibar are buried in sponge, which has 
* “Word Howe Island Polyzoa,’ Proc. Roy. Soc. Vict. vol. xvii. n.s., p. 390, 
pl. xxix. fig. 12 (1904). i 
