VINE : NEW OR BUT LITTLE KNOWN EOCENE POLYZOA. 55 
of the branches are variable, measuring from 1 to 2 mm. in the 
older parts of the zoarium. Zooecia disposed in transverse groups 
(Idmonea like) on the sides of the branches, generally from three 
to four in a row, the rows separated from each other by cancellated 
interspaces, about k mm. apart, In the older parts of the branches, 
besides the lateral disposition of the zooecia there are from two to 
three rows of cells longitudinally arranged, which decrease in number 
in the smaller portions of the branches which ultimately fade away 
in the still younger parts. This feature is faintly shown in d'Orb., 
fig. (pi. 608, f. 7). The orifices of the zooecia are circular (0"08 m.m.) 
peristomes prominent. The rest of the surfaces of the branches, 
face, sides, and reverse, are occupied by intervening cavities (ca cites 
inter squelettiques, Pergins, (op. cit., p. 311) similar to the cribriform 
features in ordinary Hornera species, fossil or recent. 
Horizon : Senonian, France ; Middle Eocene, Hants. 
Localities: France, d'Orb., "a Royan, a Bougniaux-Charente 
Inferieure ; a Meudon, pres de Paris ; a Sainte-Colombe-Manche." 
— England ; Fareham, Hants. 
1 do not think that there can be any doubt about the identity 
of this peculiar species, and its well established presence in British 
Eocene rocks. It is undoubtedly the most abundant polyzoon in the 
Fareham deposit. My first examples were embedded in masses of the 
dark Clay wdiich I was allowed to soak, and pick out the fragments 
from the softened material, but I was unable to find other species of 
Polyzoa associated in the debris. In the debris, however, I was able 
to pick out several examples of Foraminifera, Alveolina, sp. (unique), 
and Nummulites similar to species found in the Isle of Wight ; 
Miliolinae, and other species similar to, but finer than the Rotaline 
species found in the London Clay of Sheppy. My later examples 
were both free, and embedded in much harder debris commingling 
witli water-worn blackish pebbles. From the peculiar appearance of 
these conglomerate masses we may conjecture that in all probability 
some sudden inrushing of muddy gravel, broken shells and other 
material enveloped, and consequently destroyed the habitat of this 
beautiful species which was, apparently, a remnant of the old Cre- 
taceous Polyzoan fauna. I doubt, however, whether the full grown 
