PEOBOSCIXA. 
61 
Frohoscina uberrima, Xme, 1890. Bry. Bed Chalk: Quart. Journ. Geol. Soc. 
vol. xM. p. 469, pi. xix. fig. 3, 
,, irregularis, pars. Tine, 1890. Op. cit. p. 468, pi. xix. figs. 2a, b. 
Diagnosis. 
Zoarium simple, of a short, irregular, multiserial hand. 
Zooecia short, transversely wrinkled, crowded together. 
Peristomes highly raised. 
Dimensions. 
Length of zooecia 
Diameter of zooecia 
Diameter of aperture 
Vine’s type of 
irregularis D’Orbigny’s type 
(figs, a, b). {fide Pergens). 
1-0 mm. ... — 
‘25 ,, ... ’3 mm. 
•1 „ ... '12--16 „ 
Disteibetion. 
British : 
Red Chalk : Hunstanton. 
Foreign : 
Cenomanian : Le Mans, Sarthe. 
Affinities. 
This species is accepted for some badly preserved specimens 
from the Eed Chalk of Hunstanton. The zooecia agree in dimen- 
sions and general characters with those of P. hunstantonensis, 
Yine, of which this form may be a variety. They differ by the 
greater elevation and more crowded character of the peristomes. 
The Jurassic representative of this species is Frohoscina jacquoti, 
Haime, in which it is especially allied to the var. expansa', that 
variety has similar zooecial characters, but a more regular and 
branched zoarium. 
LIST OP SPECIMENS. 
D. B020. On Inoceramus, sp. Red Chalk. Hunstanton. Jesson Coll. The 
type of Froboscina uberrima. Vine, 1890 : Quart. Journ. Geol. 
Soc. Tol. xlvi. p. 469, pi. xix. figs. 3a, b. A young and rather 
thick specimen. 
D. 2018. On Terebratula biplicata. Red Chalk. Hunstanton. Jesson Coll. 
The type of Frob. irregularis. Vine, 1890 : op. cit. pp. 468, 469 
(Ho. 10), pi. xix. figs. 2a, b. 
D. 2361. On Inoceramus. Red Chalk. Hunstanton. Jesson Coll. 
