644 APPENDIX. 



Genus erinna, H. and A. Adams. 

 (Fam. limn^id^;.) 



Shell semi-globose, thin, horny, olivaceous, longitudinally 

 finely striated ; spire very short, obtuse, apex rather eroded, last 

 whorl ventricose ; aperture large, semi-ovate ; inner-lip pos- 

 teriorly ascending on the body-whorl ; columella straight, ex- 

 cavated, and with a curved, elevated, external ridge continued in 

 front into the outer lip which is simple and acute. 



Ex. E. Newcombi, H. and A. Adams, pi. 138, fig. 9. 



The little shell upon which this genus is founded was 

 obtained by Dr. Newcombe from the Henat a River, Kami, 

 Sandwich Islands. 



Vol. ii. p. 249. Sub-fam. OTININ^. 



Dr. Gray has raised this sub -family to the rank of a family 

 to receive the genera Otina, Chilina, Gamptonyx, and possibly 

 Morvillia, which differ from Auriculida in having flattened ten- 

 tacles, and from LimnmidcB 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 coloured shells. 



The genera Gamptonyx and Morvillia have recently been 

 described, the former by Mr. Benson, and the latter by Dr. 

 Gray, as follows. 



Genus CAMPTONYX, Benson. 

 (Fam. OTiNiDiE.) 



Shell cap-shaped, obliquely conical, with a sub-spiral free apex 

 directed to the right side ; surface with an external longitudinal 

 ridge and corresponding internal furrow extending frorn the apex 

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

 the margin. 



Ex. C. Theobaldi, Benson, pi. 138, fig. 10. Shell, C. Theo- 

 baldi, fig. 10, a. 



