G AITBICULID^G. 



the family: Melanopsis, Melania and Limncea (introduced by 

 Lamarck), Pyramidella and Tornatella (by Ferussac), Physa, 

 Planorbis and Ancylus (by Latreille), Acme (by Beck), Chilina 

 (by Gray), Tornatellina, Conulus and Jaminia (by Kiister). 



The remaining genera form a well-circumscribed family, allied 

 on the one hand to Limnceidce, on the other to Aciculidce. From 

 the differences existing in the shells and animals they shoidd be 

 divided into three subfamilies, Otinince, Melamjrince, and Auri- 

 culintz ; to which I formerly thought might be added a fourth, 

 Proserpinince, when the position of the eyes at the inner or 

 outer base of the tentacles shall be perfectly known ; but Dr. 

 Gray, on examining the animal, has shown that in the open-air 

 chamber and the form of the teeth, it is more allied to Cyclo- 

 stomidce, thus forming a distinct family. 



Subfam. I. OTLNIN^E. 



Mollusks living on rocks of the sea-shore, corresponding with 

 the animals of Auriculince and Melampime in the structure of 

 the external organs and in their lingual teeth. Shell ear- 

 shaped, with the columella not plaited, and the margin of the 

 peristome simple and sharp. 



Otininse, H. and A. Adams, Gen. rec. Moll. ii. p. 249. 

 Otinea, Pfr. Mon. Auric, p. 11. 



This subfamily has nearly the same relation to Auriculidce as 

 Ancylince to Limnceid<e. The only genus belonging to it is 



1. OTINA, Gray. 



Shell similar to that of Sigaretus, with few whorls, which 

 are rapidly increasing. Mouth wide, rather symmetrical ; left 

 margin flattened, sharp, not folded ; right margin simple. Ani- 

 mal resembling that of Pedipes in its structure and habits. 



Otina, Gray, 1847, Proc. Zool. Soc. xv. 156. 



Clark,' 1850, in Ann. $ Mag. N. H. vi. 448. 



Forbes and Hani. 1851, Brit. Moll. iii. 320. 



A. Adams, 1851, in Proc. Zool. Soc. xix. 225. 



Herrmannsen, 1852, Ind. Gen. Malac. Suppl. 99. 



Gray, 1854, in Ann. fy Mag. N. H. xiii. 74. 



H. and A. Adams, Gen. rec. Moll. ii. 249. 



Pfr. Mon. Auric, p. 11. 

 Helix, Velutina, Galericulum (part.), Auct. 



This genus was first indicated by Dr. Gray as a subgenus of 

 Velutina ; Clark adopted it, with some doubt, among the genera 

 of Conovulidce, which he considers " pectenibranchous." Forbes 



