BRYOZOA FROM ZANZIBAR. 839 
. 
CRISIA SERTULAROIDES (Audouin & Savigny) *. (PI. I. figs. 5, 6. ) 
Proboscina sertularoides Aud., “ Descrip. de ’Kgypte,’’ Hist. 
nat. p. 236; Savigny, pl. vi. fig. 6. 
Crisia recurva Heller, “ Bry. des Adriat. Meeres,” Verh. d. K.-K. 
zool.-bot. Gesellsch. Wien, vol. xvii. p. 118, pl. vi. figs. 3, 4 (1867). 
Zoaria of rather straggling growth, apparently about 20 mm. 
high; internodes short, with 7-15 zocecia, though usually 7-9, 
with light joints, and the branches grow from above the first 
zoceclum on that side, with sometimes another branch on the 
other side, near the distal end of the node. Branches not very 
wide (about 0°15 mm.); zoccia directed forwards with only a 
short part free, the distance from zocecium to zowcium is about 
0-21 mm., the zoccial aperture is 0°06 mm. 
The ovicells are very wide and large, irregular globular, placed 
to one side, and the oceciostome is funnel-shaped. 
The growth is like that of C. eburnea L., but the branches arise 
higher up after the first or second zocecium, and in nodes where 
there is a branch the number of zoccia is uneven. It is also 
much like C. aeropora Busk, though the denticle by the aperture 
occurs but very rarely; from C. ramosa Harm., it differs in 
having shorter internodes and in having the zoecia much nearer 
together. Although Heller’s figures and description are unsatis- 
factory, it does not seem that there can be any doubt as to the 
identity of the species. 
A specimen from Ras Osowamembe (504) has the zocecia less 
spread out, the joints black in the older parts, and toe zoccia 
about 0°28 mm. apart; the ovicells are large and irregular over 
the whole width of the zoarium. ‘The difference may only be 
local, and it seems advisable to consider it a variety. 
Loe, Adriatic (Heller). Wasin, Brit. KE. Africa, 10 fath, (500) ; 
Chuaka, Zanzibar, 3 fath. (506), collected by Crossland. 
CRISIA INFLATA, sp.n. (PI. I. figs. 1, 2.) 
This is one of the most delicate species of Crisia, and is some- 
what like C. geniculata M.-Ed., but there are two alternate zocecia 
in a joint, the new node rising from the end of the last. The 
nodes of (C. geniculata are ee to three times as long, and the 
zocecial apertures of geniculata are about 0-075 mm., whereas i in 
inflata they are only about 0:04-0:05 mm. The very light 
corneous tubes of the joint are, when examined with a high 
power, found to be marked with fine longitudinal lines. 
The ovicell is suberect and is only an inflation of the zocecial 
tube, being the simplest ovicell known. From this character the 
specific name is chosen. The oceciostome is dorsal, so that it 
cannot be seen from the front, and is a small plain tube curved 
over, with a circular aperture 0:02-0:03 mm. The ovicell is not 
* (The parentheses around the names of authors placed after scientific names in 
this paper are used in accordance with Article 23 of the International Rules of 
Nomenclature (Proc. 7th Int. Cong., Boston 1907, p. 44 (1912))—Enprtor. | 
