4 G\ and IT. Nevill — Descriptions of new Mollusca. [No. 1 , 



not umbilicated, with a simple columella, the outer lij> of the 

 aperture is not reflexed ; they somewhat resemble Amauropsis. The 

 genus was named after Sir Hercules Eobiuson, Governor of 

 Ceylon. 



E. Ceylonica, nobis, (loc. cit.), PI. I. Fig. 5. 



This shell, from Matura in Ceylon ; forms the type of the above 

 genus, it is of globose, inflated growth, composed of four whorls, 

 almost smooth, of a whitish colour, encircled with a very broad, 

 chocolate belt ; it would seem to be very rare. Long. 11, Diam. 10, 

 Alt. apert. 8£, Diam. apert. 7 m.m. 



R. pusilla, nobis, (loc. cit.) PL I, Fig. 6. 



This delicate little shell, from Balapitiya in Ceylon, is not nearly 

 so inflated as the preceding, its form being oval instead of ventri- 

 cose, composed of five whorls, the spire more acute and the 

 suture more distinct ; it is of a milky white colour with a brown apex, 

 marked on the last whorl with two, somewhat indistinct, narrow 

 brown stripes ; it resembles JR. Ceylonica in being almost smooth, 

 only slightly marked with the lines of growth. 



Long. 6, Diam. 4, Alt. apert. 3J, Diam. apert. 2h m.m. 



Fossams Stoliczkanus, n. sp., PI. I. Fig. 10, 10«. 



T. parva, alba, oviforme-oblonga, sub-crassa ; spira sub-obtusa, 

 anfractibus tribus, multi-carinatis,interstiis striis incrementi minutis- 

 simis decussatis ; anfractu ultimo peramplo, obliquo, ample et pro- 

 funde umbilicato, umbilico intus ruguloso ; apertura semicirculari, 

 labro ad marginem crenulato, uniforme curvato, intus sulcato, labio 

 crassiusculo, recto, hevi. Long. 4|, Diam. 3J, Alt. apert. 3£, Diam. 

 apert. If m.m. 



Bare, S. Province, Ceylon, — Bombay (Dr. F. Stol.) 



Fossarus insignis, n. sp., PI. I. Fig. 9, 9a. 



T. tenuis, alba, sub-turbinata ; spira per-exserta, apice acutissi- 

 ma, sutura sub-canaliculata ; anfractibus 7, convexiusculis, confertim 

 carinatis, carinis spinulose aut granulose rugosis ; ultimo anfractu 

 ventricoso, ad aperturam semilunarem dissoluto, profunde ac 



