346 H. WOODWARD ON EOCENE CRUSTACEA 
seems to have been very thinly membranous and of a blackish- 
brown colour.” 
I know of no other recorded example in a fossil state. 
It is interesting to mention that both the males with large clasping 
antennee, and the females with small antenne and egg-pouches with 
large and very distinct disk-like bodies (the compressed eggs), can 
be made out upon the slabs. 
I propose to name this interesting fossil Phyllopod Branchipo- 
dites vectensis (Pl. XIV. figs. 6-9). 
Dimensions :—Length of fossil 6 millims., breadth 2 millims. 
The two forms of Isopods discovered by Mr. A’Court-Smith differ 
considerably both in form and relative size; and as they are, more- 
over, derived from different horizons in the Bembridge beds, I feel 
justified in treating them as distinct species. 
The smaller species (Pl. XIV. fig. 1) was found in one of the 
hard blocks met with upon the beach which have yielded the 
fossil Branchipus and the insect-remains ; whilst the larger species 
(Pl. XIV. fig. 2) was obtained from a yellow marly bed charged 
with the roots of aquatic plants, which occurs somewhat higher 
up in the series. 
The former of these (fig. 1) occupies the surface of a small, 
grey, and very compact slab, in which about twenty-five Sucuee 
may be counted in the space of a few inches. 
The largest individuals measure 84 millims. in length by 44 or 
5 millima. in breadth, the smallest being 7 millims. long by 
33 millims. broad. 
The head is small, measuring only half the breadth of the 
thorax (pereion) ; the eyes are reniform, marginal, and prominent. 
The thorax (pereion) is composed of seven somites; the first of 
these is greatly produced laterally and deeply emarginated ante- 
riorly, for the insertion of the head, as is the case in several living 
species of Sphxromide and Oniscide. ‘The six succeeding somites 
are well developed, their tergal portion Beatly straight and the 
epimera somewhat strongly recurved. 
The abdomen (pleon) is composed of a dale, caudal shield, nearly 
circular in outline, and forming one third of ine leneth of the entire 
animal. Two lamellar caudal appendages or uropoda, which are 
articulated to the anterior margin of the caudal shield, are seen, one on 
either side. These, with a trace of antennee, are the only appendages 
observed in the fossil. 
_ There can be little doubt of the propriety of referring this 
species to a position near to, if not actually in, the family of the 
Spheromide ; and it is satisfactory to find that a closely allied fossil 
form, also from the Eocene, has already been so referred by Prof. 
H. Milne-Kdwards. 
I propose to place all these Tertiary forms of Isopoda Normalia 
in a distinct genus, under the name of Hospheroma, to which I 
shall refer again subsequently. I designate this small species 
Hospheroma fluviatile 
The second and larger species (Pl. XIV. fig. 2) occurs on the sur- 
