98 OTINIDA. 
Famity OTINID 2. 
Shell external, paucispiral, auriform or pileiform; aperture 
large, oval; peristome simple. 
Jaw with a superior quadrangular projection as in Succinea ; 
radula 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 Auriculide in having flattened tentacles, and 
from Limneide 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. 
Orina, Gray, 1847. 
Distr.—Kurope. 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 
Velutina, inhabit chinks of rocks between tide-marks. They 
progress in the same manner as Pedipes, by alternately fixing 
and moving forwards the anterior locomotive disk. 
CAMpTONYX, Benson, 1858. 
Distr.—C. 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 Ancylus; the cen- 
tral row only differs 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.’”—W ooDWARD. 
The habits of C. Theobaldi are terrestrial, although it lives 
attached to rocks, like Patella. 
