vine: notes ox luirrtsii E(Xexe pulyzoa. 
161 
Horizon : Bagsliot Beds, Isle of Wight. 
I have no knowledge of the Eocene example of this species. 
Those examples described by Mr. Hi neks in 1881, of which D. inter- 
media was one, were Australian forms generally : D. intermedia is 
from Tasmania. 
Family Cuibrilinid.e, Hincks. 
Genus Membraniporella (part) Smitt. 
1880. Hincks, Brit. Mar. Polyzoa, p. 199. 
For remarks on this beautiful genus, which in the Brit. Marine 
Polyzoa follows the (7r/^r////^rt gi'oup, see the above. " Menibrani- 
porella is strictly a transitional form ; but as its spines, in the adult 
condition, are so modified as to form a front wall which rises above 
the margin and roofs in the area, its place would seem to be amongst 
the CribrilinidcG." Species of the genus have a very wide geo- 
graphical distribution, but I have no fossil range to refer to. 
Membraniporella nitida, Johnston. See Hincks, Brit. Mar. 
Polyzoa, p. 200. 
The range of variation in this species is so great in recent 
examples that I hardly care to create a new specific name for this 
Eocene form. 
6. Membraniporella nitida, Johnst. Var. eocena, var. n. 
As in recent species the front of the Zooecia is disposed in lines, 
varying from twenty to twenty-six (10 or 13 on each side of the mid- 
rib) in number. Unlike M. nitida, the lines at the base of the 
Zooecia, eight in number, are formed after the manner of M. melo- 
lontha, Busk, but the cells are contiguous, not produced. Hincks 
says nothing about punctures in these flattened ribs, but in the 
eocene variety there are from three to four in some of the horizontal 
ribs. Otherwise the description of the recent species in Brit. Mar. 
Polyzoa will serve for this variety as well as regards the Ooecia, acicu- 
laria and general outline of the Zooecium. 
Horizon: London Clay, Isle of Sheppey (discovered by Mr. 
Shrubsole). 
In my own cabinet I have several recent examples of M. nitida 
from Guernsey and the Red Sea, and so variable is the ornamentation 
