EMARGINULA. 479 



instead of the general scnlptnre. This last consists of a 

 ckithration produced by the intersection of rather promi- 

 nent narrow ribs, and almost equally strong concentric 

 elevated lines ; the hollows are profound, and of a squarish 

 form. The basal margin exhibits indentations correspond- 

 ing to the ribs. Five lines in length, and four in breadth 

 and height, may be considered the full dimensions of this 

 Emarginula. 



The animal is white, and closely resembles in all its 

 features that of the succeeding species, but the foot is 

 never so bulky. 



This species is generally distributed around our shores, 

 and is especially abundant in the North and in the Irish 

 Sea. It inhabits shell banks and clear ground in from 

 near low-water-mark to as deep as ninety fathoms, abound- 

 ing most in from twelve to twenty fathoms. It is found 

 all along the western shores of Europe. 



E. KosEA, Bell. 



Ribs subgranose or somewhat geniculated ; vertex greatly 

 recurved, on a level with, or extending beyond, the posterior 

 margin ; interior occasionally tinged with rose-colour. 



Plate LXIII. fig. 3. 



Zejoas, ^-c. Martini, Conch. Cab. vol. i. p. 145, pi. 12, f. 109, 110 (probably). 

 f Patella fissura (young), Mont. Test. Brit. vol. ii. p. 491. 

 Emargimila conica, Schumacher, Syst. Vers, Testae. (1817), p. 181 (no de- 

 scription; solely from Martini's figure). 

 „ rosea. Bell, Zoolog. Journ. vol. i. (1824), p. 52, pi. 4, f. 1 ; Annals 



Philos. 1825, p. 388.— Hanl. Brit. Marine Conch, p. 

 xxxii.— Brown, 111. Conch. G. B. p. G2, pi. 12, f. 21, 22. 

 — Recluz, Revue Zool. Cuvierienne, 1843, p. 234. 

 „ pileolus, MicHAUD, Bulletin Linn. Soc. Bordeaux, vol. iii. (1829), 



p. 171, f. 23, 24, teste Philii'PI, Moll. Sicil. vol. ii. p. 89. 

 „ capuliformis, Philippi, Moll. Sicil. vol. i. p. 116, pi. 7, f. 12. 



