EMARGINULA. 481 



project beyond the shell ; its edges are scalloped, and 

 in front it is emarginated on the region of the anal fissure, 

 which is bordered on each side by an angulated projecting 

 lobe. The foot is large, strong, and very steep-sided ; 

 at its junction with the body is a circle of about twenty 

 rather distinct very short papillary cirrhi. 



This species which, though closely approaching some 

 varieties of the last, is probably very distinct, is, so far 

 as we have seen, on our shores, mainly a southern form. 

 It was first taken at Poole by Professor Bell. It occurs 

 on the rocks at Herm (S. EL); Exmouth (Clark) ; in seven 

 fathoms, Weymouth Bay ; in fifteen fathoms west bay of 

 Portland ; and in twenty to twenty-five fathoms off 

 Plymouth (M L Andrew and E. F.) ; Langland Bay near 

 Swansea (Jeffreys) ; Fowey, Cornwall (Peach). 



Mr. Dillwyn received a specimen from Montagu under 

 the name of fissura (Jeffreys). Mr. Jeffreys and Mr. 

 Barlee both mark its occurrence in the Hebrides, but 

 though we have frequently met with very hooked varieties 

 of the last species, we never saw a specimen there which 

 appeared to be a true rosea. 



It ranges to the Mediterranean, and the fossil shells 

 designated fissura in the crag seem to us to belong to 

 rosea. 



E. crassa, J. Sowerby. 

 Not clathrated ; vertex subcentral ; slit short. 



Plate LXIII. fig. 2, and (Animal) Plate CC. fig. 2. 



Emargintda crassa, J. Sowerby, Min. Conch, pi. 33 (fossil). — Forhes, Annala 

 Nat. Hist. vol. xiv. p. 410, pi. 10, f. 1. — Thompson, 

 Annals Nat. Hist. vol. xviii. p. 384. — Loven, Moll. 

 Scandinav. p. 20. — Nyst. Coq. foss. Belg. p. 352, pi. 36, 

 f. 3 (fossil). — Searles Wood, Crag Mollusc, p. 165, pi. 

 xviii. f. 2. 



VOL. I!. 3 Q 



