132 LlTTORINIDJi. 



very short, and ends in a blunt apex ; its component volu- 

 tions are but little elevated. The body occupies a full half 

 of the total length of the shell, and is ventricose and 

 rather broad ; its basal declination is well rounded, but 

 rather sudden. The mouth, except in the young, is not 

 quite equal in length to the part above it, but usually 

 occupies about three-sevenths of the entire length ; it is 

 obovaj;e, well rounded below, and a little contracted above. 

 The outer lip is acute, arcuated, and not expanded. The 

 pillar-lip is long, of moderate bi'eadth, almost perpendicular, 

 very little arched, raised, reflected, and flanked by a dis- 

 tinct umbilical cavity ; the latter occasionally sharply de- 

 fined, and rather large. The total length scarcely exceeds 

 the twentieth of an inch, and the breadth is still less. 



This shell bears much resemblance to imlclitrrima^ but 

 is distinguished by its spiral lines ; its less globular shape, 

 the slower attenuation of its spire, and the absence of any 

 coloured markings. 



A very rare shell, but possibly more widely distributed 

 than we at present know. Exmouth (Clark) ; Burrow 

 Island (Rev. G. M. Beevor) ; Lamlash Bay and Bute 

 (Bean); Cork Harbour (Jeffreys). 



R. LiTTOKEA, Delle Chiaje. 



Globular-conoid, quite smooth, of an uniform pale fulvous tint; 

 body swollen ; whorls convex ; spire short ; mouth occupying 

 one-half of the entire length. 



Plato LXXXI. fig. C, 7. 



Hdix litlorina, Delle Chiaje, Mem. Anim. senza Vert. Napoli, vol. iii. p. 215, 

 pi. 49, f. 36, 37, 38. — Philippi, Wicgm. Arthiv. Natuig. 

 1841, p. 53, pi. 5, f. 7. 



Rhsoa 9 (jloliularis, Metcalfe, Brit. Marino Couch, p. xlii. f. 87. 



TriinmteUa litlorina, Philippi, Moll. Sitil. vol. ii. p. 133, pi. 24, f. 2. 



