Polyzoa of Queen Charlotte Islands. 209 
fine specimens from California (where it seems to be ex- 
tremely abundant) and Vancouver Island enable me to cor- 
rect my description of it in one or two particulars. 
I find that on the same colony internodes composed of three 
cells are mingled with others bearing five or six, so that it is 
incorrect to designate the triple condition as a distinct form. 
We have a similar variation in Menipea ternata. 'The oper- 
culum is not ‘acicular,” as described, in its fully developed 
state, though always very moderate in size. It is usually, in 
its perfect condition, clavate, expanding slightly above. 
M. compacta grows in luxuriant bushy tufts, which bristle 
with spines. 
Family Cellariide. 
Cellaria mandibulata, n. sp. (Pl. IX. fig. 7.) 
[ Described in ‘ Annals’ for December 1882, p. 463. ] 
The figures represent the avicularium, which exhibits pro- 
bably the least specialized form of the appendage in the Cel- 
larian series, and a shoot of the natural size, in which there 
is a curious departure from the usual dichotomous ramifica- 
tion. The branches are given off from the stem at intervals 
on each side, instead of forming a fork at the joints. This 
peculiarity, however, does not appear to be characteristic of 
the species. 
Family Membraniporidz. 
Membranipora velata, Hincks. 
This Californian species occurs on shells dredged off Cum- 
shewa ; but the specimens from the Queen Charlotte Islands 
are destitute of the large avicularia. (See ‘ Annals’ for 
August 1881, p. 130.) 
Membranipora acifera, MacGillivray, form multispinata. 
[‘ Annals’ for December 1882, p. 465, pl. xix. fig. 4. ] 
In a previous portion of this Report I have referred a 
Membranipora from the Queen Charlotte Islands to the JZ. 
acifera ot MacGillivray*, of which it seemed to me to be a 
variety. But in a paper read before the Royal Society of 
Victoria, October 12, 1882, MacGillivray states that further 
examination has led him to identify this species with his JZem- 
branipora serrata, which is certainly quite distinct from the 
North-Pacific form. I shall therefore characterize the latter as 
* Described and figured in a paper read before the Royal Society of 
Victoria, December 9, 1881. 
