46 
PKOBOSCINA. 
Foreign : 
Senonian — Maastrichtian : Meudon, near Paris. 
Santonian : Arche de Leves. 
Coniacian: Tours, Indre-et- Loire; Yendome, Loir-et-Cher ; 
PVillavard and Les Roches, Loir-et-Cher. 
Cenomanian : Saxony, in Lower Planer. 
Figtjees. 
PI. III. Pig. 6. A specimen with irregular zoarium, with the 
peristomes locally in transverse series. Middle Chalk : Chatham. 
Pig. 6a, zoarium, natural size ; Pig. 6b, part of a branch of the 
same, X 15 dia. Gamble Coll. D. 485. 
PI. III. Pig. 9. A regular zoarium. Middle Chalk : Chatham. 
Pig. 9a, zoarium, natural size ; Pig. 9i, one branch of the same, 
X 12 dia. Gamble Coll. D. 440. 
PI. III. Pig. 10. One branch of a zoarium with two broken 
gonocysts, X 12 dia. Middle Chalk: Chatham. Vine Coll. 
D. 2686. 
PI. IV. Pig. 1. A large irregular zoarium with several 
gonocysts. Middle Chalk : Chatham. Pig. \a, zoarium, X 6 dia. ; 
Pig. IJ, part of the same, showing one whole and one broken 
gonocyst, X 18 dia. Vine Coll. D. 986. 
Affinities. 
This species is one of those Proboscince in which the branches 
rapidly expand into broad Berenicoid sheets. Its nearest Cretaceous 
allies are Proboscina dilatata, which differs by having an unbranched 
zoarium with much stouter zooecia, and P. sarthacensis, Perg., which 
has larger and more scattered zooecia, and in which the branches are 
typically clavate. 
Eeuss’s P. subclavata appears to he a fairly typical form of this 
species. 
The slender zooecia and their growth in crowded tufts are 
characters which distinguish this ‘ species ’ from the Cainozoic 
Proboscin(B. 
LIST OP SPECIMENS. 
D. 485. A large irregularly branched zoarium on fragment of Inoceramus, with 
Micropora, sp. In places the apertures occur in regular transverse 
series resembling those of F. radiolitorum. Middle Chalk. 
Chatham. Gamble CoU. Figd. PI. III. Fig. 6. 
