appendix. 645 



This interesting genus was found by Mr. W. Theobald, Jan., 

 on the central peak of Mount Girnar, in Kattiwar, on the pen- 

 insula which separates the Gulfs of Cutch and Cambay, adhering 

 to the rock like limpets. 



Genus MORVILLIA, Gray. 



(?Farn. otinice.) 



Tentacles thick, rather depressed, near together at the base. 

 Eyes on the outer side near the base. Mantle thickened within 

 the front. Foot oblong. 



Shell ovate, orbicular, compressed ; spire conical, whorls three 

 or four, the upper small, the last very large; aperture ovate, very 

 large, nearly the whole length of the shell; outer-lip sharp and 

 spreading; inner-lip sharp-edged, margined with a flattened, 

 crescent-shaped, opaque-white space. 



Ex. M. zonata, Gould. 



This genus is founded on Velutina (Limneria) zonata, and 

 Olinafnsca forms a second species. 



Genus POMPHOLYX, Lea. 



(Fam. LIMN>EID,E.) 



Operculum none. 



Shell rotund-gibbous, reflexed beneath, flattened above, not 

 umbilicated ; spire depressed ; apertm-e very large, sub-circular, 

 expanded ; outer-lip acute ; inner-lip thickened and slightly 

 flattened. 



Ex. P. effusa, Lea, pi. 138, fig. 11. 



The only species of this genus yet described is from the river 

 Sacramento in California. 



Vol. ii. p. 286. Genus RAPIIAULCS. 



Sub-gen. stkeptaulus, Benson. 



Shell with the spiraculum reflexed, not opening on, but above, 

 the peristome. R. Blanfordi, Benson, is an example. 



VOL. II. 4 



