556 J. S. Gardner — Notes on Cretaccous Gasteropoda. 
V. — Notes on Cretaceous Gasteropoda. 
By J. S. Gardner, F.G.S. 
(PLATE XVI.) 
I N May last I had the honour of laying before tbe Geological 
Society a description of all the known British Cretaceous Patellidce 
and patelloid Gasteropoda. Since then the well-known collector, 
Griffiths, of Folkestone, has forwarded to me a new limpet from 
Hythe, which appears to belong to the genus Hipponyx. The finding 
of a sliell of this genus is remarkable, as hitherto the shelly bases were 
the only indications of the existence of Uipponyx in Cretaceous rocks 
in England, whilst Capulus Dunkerianus, .d’Orb., was the only shell 
on the Continent, of this age, which could be referred to the genus. 
Hipponyx neocomiensis, sp. n. PI. XVI. Fig. 1. 
Lower Greensand, Hythe. 
Conical, cap-shaped, very elevated, front flattened and com- 
pressed, posterior flattened and slightly hollowed, margin slightly 
quadrate. The cast shows the shell to have been'very thick, and 
there are indications of coarse ribbings; the beak was probahly solid 
and overliung the posterior margin. The dimensions are large, as 
seen by a reference to the figure. The great size of this and all 
Gasteropods from Hythe compared with those from other British 
Lower Greensand localities is truly remarkable. 
Dentalium major, sp. nov. PL XVI. Fig. 2. 
Cast bed. Grey Chalk, Dover. 
Tubulär, symmetrical, slightly curved, very gradually tapering ; 
surface evenly striated near the apex, plain and rather rugose towards 
the aperture. This is one of the alated forms, remains of slight 
hordering keels being visible here and there on the figured specimen, 
and more perfectly on others. The tube was probahly elliptical. 
Dimensions : length 4f inches, breadth at aperture fth of an inch. 
This is the largest Dentalium known, exceeding D. grandis from 
Japan in size by about an inch. Portions were found by me, during 
my last visit to Folkestone, in the cast bed, where it appears to be 
common. The figured specimen was found by Griffiths. 
The Figures 3 to 18 are drawn from specimens kindly lent by Mr. 
Thomas Jesson, F.G.S., late of Trinity College, Cambridge, and unite, 
it appears to me, the following species from Cambridge. 
1. Crepndula gaultina, Buvignier. 
2. Galyptrcea Cooksonice, Seeley =: C. sanctce-crucis, Pichet Camp. 
3. (?) Crepidu/a alta, Seeley. 
The depressed form (Figs. 3, 4, 5, 20) known as Crepidula 
gaultina, also found at Folkestone, is perbaps a young form, and, from 
its flattened appearance, seems to have been fixed inside the apertures 
of shells. Figure 20 is taken from the specimen originally described 
by Seeley. 1 The higher form known as Calyptrcea Cooksonice, Seeley 
(Figs. 6 to 19), may have been occasionally attached to the outside of 
shells, as similar difierences according with the position of attach- 
ment may be seen in the forms of recent Calyptrmda in the cases at 
the British Museum. No character is discernible by which the 
1 See Q. J. G. S., May, 1877, p. 201. 
