GASTEROPODA. BULLADE. 43 
Shell with longitudinal, antiquated striole, and with some- 
what transverse, slightly undulating striole. 
Inhabits the sea, but is generally found only in estuaries. 
It has been observed at Pool, Weymouth, Southampton and 
Portsmouth ; and is said to occur on the coasts of Devon. 
Its animal is said to be very lively and active; it has not, 
however, been described in a correct or scientific manner. 
Genus 19. Roxanta. 
Testa solida, oviformis ; apertura anticé paulo hians ; spira 
immersa; umbilicus perforatus. 
Ventriculus testis nullis mstructus. 
Shell solid, egg-shaped ; aperture gaping a little anteriorly ; 
the spire immersed ; umbilicus perforate. | 
I have examined an animal of this genus in a bad state of 
preservation, and found that its stomach, which was strong, 
and filled with the debris of minute shells, had not the slightest 
indication of the hard appendages found in its kindred genera, 
Bullea, Scaphander and Haminea. It is on this account that 
I have separated it from Bulla, the true type of which is Bulla 
Ampulla, from which it likewise differs in having an umbilicus, 
as well as in the general habit of the animal and shell. 
1. Roxania Crancuit. Tab. VII. fig. 11. 
R. testa crebré punctata; punctis in strias longitudinales 
digestis, anticé et posticé longitudinaliter striatis; striis 
plerumque punctatis. 
Habitat in Danmoniz mari profundo, rarior. 
Shell, with closely impressed dots, arranged into longitudinal 
striee, anteriorly and posteriorly striated longitudinally ; the 
striee generally punctured. Length six-eighths of an inch. 
This species was discovered by Mr. J. Cranch in deep water, 
off Falmouth, im 1815, and afterwards in the Plymouth Sound, 
from whence it has likewise been obtained by C. Prideaux, Esq. 
Since writing the above, I have received an Irish specimen 
of the shell from my very liberal friend, the Provost of Eton, 
