98 OTINID^. 



Family OTINIDJG. 



Shell external, paucispiral, auriform or pileiform ; aperture 

 large, oval ; peristome simple. 



Jaw with a superior quadrangular projection as in Succinea; 

 radala with simple, narrow, unicuspid laterals, and bicuspid 

 marginals. 



These mollusks unite with an animal resembling Auricula, the 

 shells of an Ancylus or Lamellaria. 



Differs from Auriculidae in having flattened tentacles, and 

 from Limnteidse in having the eyes on the upper part of the 

 base of the tentacles, instead of at the inner edge of the base, 

 and in having colored shells. Amphibious. 



Otina, Gray, 1841. 



Distr. — Europe. 0. otis, Turton (ciii, 2). 



Shell thin, globular-sigaretiform, paucispiral ; whorls rapidly 

 enlarging; aperture very large, oval; columellar lip smooth; 

 outer lip simple, sharp. 



Tentacles nearly obsolete ; eyes sessile, on the upper part of 

 the head at their hind bases. Foot divided by a transverse 

 groove across its centre, and furnished with a creeping disk at 

 each end. 



These animals, whose shells so closely resemble those of 

 Yelutina, inhabit chinks of rocks between tide-marks. They 

 progress in the same manner as Pedipes, b}^ alternatel}^ fixing 

 and moving forwards the anterior locomotive disk. 



Camptonyx, Benson, 1858. 



Distr. — G. Theobaldi, Benson (ciii, 4), India. 



Shell cap-shaped, obliquely conical, with a subspiral free apex 

 directed to the right side ; surface with an external longitudinal 

 ridge, and corresponding internal furrow extending from the 

 apex to the right margin ; aperture large, ovate, entire, expanded 

 at the margin. The shell is like a Pileopsis, with a respiratory 

 channel on the right side. 



"Animal with the respiratory orifice on the edge of the mantle. 

 Eyes sessile at the middle of the hinder part of the base of the 

 tentacles, and are visible only from above ; tentacles rather 

 conical than angular; upper mandible conspicuous, slightly 

 lobed ; lingual ribbon broad, with 86 rows of teeth, 87 in a row 

 (43.1.43) ; they have simple obtuse hooks as in Anc3-lus ; the cen- 

 tral row only diff"ers in being symmetrical; the laterals diminish 

 gradually from the 14th to the 43d, and a second cusp makes its 

 appearance, and increases until the three near the margin are 

 regularly bicuspid. " — Woodward. 



The habits of G. Theohaldi are terrestrial, although it lives 

 attached to rocks, like Patella. 



