222 W, T. VAAniord—Confrihiifions io Indian 3IaJacolo(jy. [No. 4, 



Indian CorlicuIcB. The genus, like Unio, appears to have been designed by 

 a beneficent Providence for the amusement of species-makers. Many of 

 the described local races in all probability pass more or less into each other. 



Explanation of the Plates. 

 Plate II. 



Pig. 2. EupTecta vidua, var. minor, natural size. 

 ,, 4. This shell has not heen described, the type having been mislaid, and one 



figure, that shewing the shell from the mouth, omitted in the plate. 

 „ 5. Euplecta vidua, typical form, natural size. 



„ 8. Macrochlamys tenuicula, two views, natural size. In the left hand figure 

 one whorl too many is represented, and in the right hand figure the 

 peristome is represented as thick instead of very thin. 



„ 9. Macrocldamys platychlamys, two views, natural size. In the right hand 

 view the lip should have been represented as very thin. 



„ 10. Streptaxis personatus, three views, enlarged two diameters, fair. 



„ 11. Streptaxis concinmis, three views, enlarged two diameters, teeth rather in- 

 distinct, otherwise good. 



„ 12. Streptaxis piromts, three views, enlarged two diameters, teeth not correctly 

 represented ; see description. 



„ 13. Streptaxis compressiis, three views, enlarged four diameters ; the teeth are 

 incorrect, especially in the middle figure, where three are represented 

 on the basal margin of the aperture instead of one only. 



,, 14. (Upper figure) sitJwsiH/ate, enlarged four diameters. The columellar 



tooth should be lower down. 

 14. (Lower figure) Ennea exilis, enlarged four diameters. All the teeth are 

 wrongly represented ; see description. 



„ 15. Ennea macrodon, enlarged four diameters. The teeth in the peristome are 

 not distinct in the figure, and the large tooth inside the base is omitted 

 altogether. 



„ 16. Ennea stenostoma, var., enlarged four diameters. Teeth not cortect, they 

 should be precisely the same as in fig. 17. 

 17. Ennea stenostoma, typical form, enlarged four diameters. The mouth too 

 broad, it should be of the same shape as ia fig. 16. The teeth are 

 correct. 



„ 18. Eealia {Omphalotropis) anderso7ti, enlarged two diameters : fair figure. 

 ,, 19. Eealia pallida, enlarged two diameters, not good, the penultimate whorl 

 is by far too large, and the suture wrongl}^ drawn. 

 22. Pahidomus travaneoriea, natural size, good figure. 



N. B. As already noticed in the text, several of the figures in this plate are 

 unsatisfactory. In especial, the teeth in the aperture of some forms of Ennea and 

 Streptaxis are bj' no means accurately represented. The plate having been twice 

 lithographed, it appears hopeless at pres(!nt to try to obtain greater accuracy. The 

 general form of the shells is as a rule correct. The imperfection of the plate is partly 

 due to its having been lithographed during the absence of the author of the present 

 paper. 



Plate III. 



Pig. 1. Hemipilecta tinostoma. 

 „ 2. Hemiplecta enisa. 

 „ 3. Xestina albata. 

 „ 4. Ariophanta immerita. 



6. Macrochlamys wyniiei. 

 „ 6. Spiraculiim travancoricum. 

 ,1 7. Cataulus costulatiis. 



N. B. The figures on this plate arc all fairly good ; all aie of the natural si'ze 

 except ',b. 



