Classification of the British Polyzoa. 
157 
Their affinities are obscure; but they have no relationship 
with Cellepora , as their name might be taken to imply. The 
free tubular orifice with which both the species are furnished 
is a Porinidan character; and on the strength of it I place them, 
provisionally at least, in this group. 
Fam. 13. Myriozoidae (part.), Smitt. 
Genera : Schizoporella, Hincks. 
This genus includes members of the old Lepralia , John¬ 
ston, with a semicircular or suborbicular orifice, and a sinus 
on the lower margin, however they may differ in superficial 
sculpture, in the number and position of the avicularia (most 
unstable characters), the shape of the cells, or the habit of 
growth. ILerneschara sanyuinea , Norman, also finds a place 
in it, ranking alongside its near ally Lepralia linearis , 
Johnston. 
I have not separated from it Lepralia venusta , Norman, 
notwithstanding the remarkable shape of its orifice, as 
we have transitional forms between it and the usual structure 
in this genus (e. g. in S. sanyuinea ), and the peculiarity lies 
in a mere matter of detail, and does not affect the type. 
Schizoporella cristata , nov. sp. 
Zooecia small, short-ovate or rhomboidal, distinct, convex, 
divided by rather deep sutures ; surface silvery, smooth or 
slightly furrowed, with a few punctures ; orifice suborbicular, 
with a central sinus below, and five marginal spines ; imme¬ 
diately under the lower margin a prominent mucro, from 
which the elevated peristome passes off on each side, forming 
with it a wall round a large proportion of the orifice ; on the 
inner side of the mucro a very small and delicate avicularium , 
with pointed mandible directed straight upwards. Ooecia 
(proportionally) large, subglobose, punctured, with an erect, 
crest-like ridge running across them at the top. 
Primary cell very small, suborbicular, sides sloping steeply 
upwards, the summit occupied by an oval area, at the upper 
part of which is placed the semicircular orifice, sinuated below ; 
six spines round the orifice and three on the lower border of 
the area. 
Loc. Hastings, on Pecten maximus (Miss Jelly). 
Mastigophora, Hincks. 
Type M. Hyndmanni , Johnston. 
