Descriptive Catalogue of the British Testacea. dq55 
Habitat ad littora. 
. Testa diametro 4. poll. subalbida, flavescens vel cinerascens, lineis obliquis 
parallelis brunneis, AÆnfractus striis obsoletioribus, Spira obtusior. 
Umblilicus minus patulus. © 
. Notwithstanding the figure in Chommit. referred to 
by Gmelin for Tr. cinerarius of Linnæus, resembles our 
shell, we cannot suppose it to be that species, as it does 
not sufficiently agree with the description in the Systema 
Nature of “ Anfractibus rotundatis," or the more detailed 
characters given by Otho Sapa in his Fauna Groen- 
landica. 
A. f i i 
umbilica- T. testa Mtabilicáta, pui ; anfractibus contiguis 
tus. Lister Conch. t. 641. f. 32? 
: ` Pennant Brit. Zool. t. 80. f. 106. 
Da Costa Brit. Conch. p. 46. t. 3. f. 7, 8. 
Pulteney in Hutch. Dorset. p. 44. t. 16. f. 7, 8. 
~ Donovan Brit. Shells, t. 74. fig. med. 
Montagu Test. Brit. p. 286. 
Habitat in mari, ad littora. 
Testa magnitudine uvz, albida, fasciis obliquis fale idc Anfractus 
i substriati, parum convexi, ita coadunati, ut difficillime diningoendi. 
. Spira obtusissima. Umbilicus testam perforat. 
Lister’s figure is a doubtful one, though so common 
ug shell must have been known to him. à “Pennant i ima- 
gind it to be the Tr. umbilicaris, and Dr. Pulteney the 
- Tr. cinerarius, of Linnæus; but it will not. agree with 
the APPS of eit FE 
5. 
tumidus. Ts tésta subconica, striata ; anfractibus prominentibus 
planis, 
Chenn. Conch. 5. t. 171. f 1676? 
Linn. Gmel. p. 3574. Tr. patholatus?- 
vor. VIIL X . Montagu 
