02 Mr. H. Woodward on the 2\rtiary Shells 



Conch iFERA. ♦ 

 Fam. Corbulidae. 



1. Pachydon, Gabb. P. erectux, Conrad. 



P. tenuis, Gabb. P. cuneaius, Conrad. 



P. carinatus, Conrad. P. ovatus, Conrad. 

 P. obliqims, Gabb. 



1. Iscea^ Conrad, Amer. Journ. Conch. 1870, pi. 10. 

 figs. 6, 10, 13. 



In the series before us we have no representatives of this 

 genus. The figures given in Mr. Conrad's plate are not worth 

 reproducing, having evidently been drawn hurriedly and with- 

 out sufficient care. 



Mr. Conrad presumes this form to be a freshwater shell 

 closely allied to Tricula^ Benson, found in India. 



2. Li'ris, Conrad, op. cit. pi. 10. fig. 3. 



The figure indicates a shell about 2 lines in length. These 

 two shells, Mr. Conrad considers, probably belong to the 

 Melaniidaj. 



3. Ehora crass ilahra, Conrad, o^^. cif. pi. 10. fig. 14. 

 PI. V. figs. 1 a, h. 



" Shell turbinate ; columella much arched ; peristome con- 

 tinuous, thickened ; aperture notched at base." We venture 

 to refer the specimen figured on our plate (figs. 1 a, h) to this 

 species ; but Mr, Conrad's figure is very obscure. We have 

 three specimens, all of which are umbilicated and the mouth 

 very much produced. 



This little shell closely resembles Lacuna^ a North-American 

 genus inhabiting brackish water. 



The one selected for our figure indicates the presence of 

 another Gasteropod of the family Buccinidge, or Nattca, as 

 evidenced by the perforation in its whorl. This is most impor- 

 tant, as Mr. Conrad expresses his inability to decide whether 

 Ehora be a marine or freshwater genus. 



Length 4 lines, breadth 3 lines. 



3 a. (Subgenus) Nesis bella, Conrad, oj). cit. pi. 10. fig. 17. 

 PI. V. fig. 3. 



" Last whorl ornamented with seven prominent revolving 

 ribs, the intermediate spaces concave ; spire consisting of four 

 volutions, flat towards the apex, two ribs on each exce])t the 

 apical Avhorl and the next, which are smooth." 



We do not possess a specimen of this shell ; but its foi-m, 

 which is very characteristic, leaves little doubt that it is refer- 



