NORTH BRITISH TESTACEA. 



4°3 



TROCHUS. 



Animal a Limax. Shell univalve, spiral, more or 

 less conic. Aperture somewhat angular or 

 rounded. The upper side transverse and con- 

 tracted. Pillar placed obliquely. 



1. crassus. ^ M. One specimen of this shell 



Turbo lineatus' 3 <D. was taken by the dredge 



from deep water, off Dun- 

 bar. 



Q. cinerarius. P. D. M. On all parts of the coast, 



not uncommon. 



3. umbilicatus. P. D. M. Same as the above. 



4. tumidus. M. From the rejectamenta of a 



boat at Newhaven; also 

 from a boat at Preston- 

 pans, scarce. 



TURBO. 



Animal a Limax. Shell univalve, spiral, solid, 

 Aperture contracted, orbicular, entire. 



1. terebra. P. M. D. Leith and Portobello Sands, 



common : on the ]ast place, 

 a variety perfectly white 

 occurs. This variety I 

 at first considered to be 

 bleached shells but could 



