280 



5. 



ToMiDus. Troehus Naffavienfis. Chcm. Conch, v. t. 171. f, 1676 ? 



Tab. 10. f. 4. 4. ^ , . • , n 1. • , r 



T. with a ftroncr, fub-comc, tumid niell, with five voluti- 



ons, wrought with extremely fine, clofe-fet, fpiral flriee, in- 

 ter rupted only by a deep fcparating line; the volutions pro- 

 ject confiderably, but are not rounded : the point is fmall, 

 but not taper; at the bottom of the body whirl is a fub- 

 carinated edge : the bafe is a little rounded, and furniflTed 

 with a fmall iimhilicus, frequently decreafing with age, 

 and fometimes almofl: clofed in the larger fhells : aper- 

 ture fub-quadrangular, pearlaceous within : colour prin- 

 cipally cinereous-brown, fometimes with a yellowifii 

 caft, and rarely of a dark purplifh-brown ; all more or lefs 

 flreaked with fine, obfcure, undulated lines, longitudinal- 

 ly : the purplifli coloured fpecimens are fometimes fpotted 

 with white at the top of each volution. Length feldom 

 more than a quarter of an inch, and never quite three- 

 eighths ; breadth ufually more than its length. The outer 

 coat of this fliell is extremely thin, under which the mo- 

 ther of pearl, gives it a fingular bronze appearance, in 

 fome particular points of view. 



This may be confidered by no means a plentiful fpecies. 

 We have hitherto only taken it alive, by dredging, in Sal- 

 comb bay, where it is frequently found adhering to ftones 

 and broken fhells: dead ones are met with fometimes on 

 other parts of the coaft oS. Devon, particularly at Torcrofs, 

 amongft algcs brought on fhore by the feine, and other 

 fifliing nets; thcfe are mod times occupied by the fmaller 

 Cancer Bernard us. 



Have 



