GASTEROPODA. BULLADZ. 41 
subcorneis, zequalibus (entomolithem referentibus), inferis in- 
structus. Penzs gracilis ad apicem abrupte ovato-clavatus. 
Shell hard, ovate-ventricose ; the spire concealed ; the aper- 
ture gaping anteriorly ; umbilicus none. Stomach with three 
equal, somewhat horny, appendages, resembling the Dudley 
fossil (entomolithus) in form, and embracing its lower part. 
1. HaminzaA CuviERt. 
H. testa longitudinaliter crebro undulato-striata ; striis crenatis. 
Bulla Hydatis, Pult. Cat. Dors. t. 23. fig. 10; Donov. Brit. 
Shells, t. 88; Mont. Test. Brit. 217. vignette 1. fig. 1-6; 
Cuv. Ann. de Mus. xvi. t. 13. figs. 11-13; Reégne Anim. ui. 
400; Turt. Conch. Dict. 20; Mont. Trans. Linn. Soc. ix. 
106. t. 6. fig. 1, animal. 
Habitat in mari profundo. Apud Studland, Southampton, et 
Salcombe, sat frequens. 
Shell with numerous longitudinal, undulated, wrinkled striz. 
Colour of the adult, red-chestnut ; of the young, pellucid green. 
The strize on young shells are very faint, often obsolete, and 
rarely crenate. 
The animal is incapable of retiring within its shell. When 
at rest, the shell is nearly concealed by the lateral and poste- 
rior dilatations of the foot. All the upper parts and dilatations 
of the foot are of a testaceous colour, tinted with orange, or 
passing into yellowish brown, and speckled with black or pur- 
plish brown. In Montagu’s figure in the Linnzean Transactions, 
are represented two spots, near the centre of the reflected upper 
lip, which the author believed to be the eyes. This can be 
made out only by dissection. Length of the shell one inch and 
a half; of the animal, three inches. 
Inhabits most of our sandy coasts. It is tolerably abundant 
at Studland, Pool, Southampton, and Salcombe, and has been 
occasionally found in profusion at Weymouth, near Dunbar, 
and in Bantry Bay. 
Bulla Hydatis, of Linné, belongs to a very different genus, 
and is figured by Gualtieri; 1 have therefore named this species 
after Cuvier, who has made us first acquainted with its anato- 
mical structure. 
