Classification of the British Polyzoa. 
163 
zooecia in the three species rankel under this genus, I have 
little doubt that they are rightly associated. The form first de¬ 
scribed by Alder under this name had its cells disposed in 
four longitudinal series, and in this respect differs from its 
congeners ; but the mere number of the rows can have no 
generic import *. 
Zooecia with the primary orifice orbicular, or varying from 
semicircular to semielliptical; the peristome elevated around 
it and carried out into a projecting palmate or mucronate 
process, with an avicularium on its inner aspect. Zoarium , 
in the British species, erect and ramose. 
Species : P. elegans , Alder. 
P. Skenei , Ellis and Solander. 
P. loi *ea, Alder. 
?? P. cribraria, Johnston. 
Bhynchopora, Hincks. 
Species : P. bispinosa , Johnston. 
Fam. 14. Celleporidse. 
In his later writings Prof. Smitt has abandoned this family, 
and has placed his genus Cellepora amongst the Myriozoidse. 
With great deference to his opinion, I venture to think that 
there are sufficient grounds for its retention. The erect habit 
of the cells and the confused way in which they are aggregated 
are not the only characters which distinguish this section and 
mark it off from the neighbouring families. 
The character of the cells is very uniform and distinctive; 
in this respect the facies of the group is well marked and suffi¬ 
ciently differentiates it. The zooecium is more or less urceo- 
late, with a perfectly terminal orifice; and the peristome is 
usually much elevated round it and carried up into one or 
more prominent rostra, supporting avicularia. The zooecial 
characters, as it seems to me, supply a good basis for the 
family, and, in combination with the vertical iiabit and the 
irregular gemmation, indicate a very natural group. 
Genera: Cellepora (part.), Fabricius. 
Celleporaria, Smitt (not Lamx. or D’Orbigny). 
The latter genus will include our British C. HassallvL 
* I have not ranged the Lepralia verrucosa , Esper, under any of the 
foregoing genera. It is allied (and not distantly) to Palmicellaria 
through the structure of the zooecial orifice; but there are differences 
between the two forms which make me hesitate to unite them. Possibly 
it may be necessary to constitute a genus for the reception of this species. 
11 * 
