CONCHOLOGIA INDICA. 



43 



9. C. stenostoma, var. anguis, Sowerby. 



Top of Nilgherries, with the preceding. 

 This shell (possibly a distinct species) is not merely 

 larger than the preceding, but has the entire upper 

 surface concentrically shagreened by wavy and some- 

 what broken raised wrinkles. 



10. C. cadiscus, Benson, An. Nat. Hist. 1800, ser. 

 3, vol. 5, p. 385.— Pfeif. Mon. Pneum. vol. 3, p. 67. 



Matelle, Ceylon. 

 This is the same shell we had given another view of 

 in Part I. (pi. 3, f. 8, not 9), as a form of Thwaitesii ; 

 at that time neither the collections of Benson nor 

 Layard were adequately known to us, and even now 

 the limits of pnrapsis, cadiscus, and Thwaitesii are not 

 clear ; Benson's ideal of the last, however, does not 

 seem that of Pfeiffer. 



PLATE CVI. 

 CATAULUS. 



1. C. Templemani, Pfeiffer, Proc. Zool. Soc. 1852, 

 p. 158 (as Pupina). — Mon. Pneum. vol. 2, p. 87. — 

 Sow. Thes. Couch, vol. 3, pi. 264, f. 12. 



Ceylon. 



2. C. duplicatus, Pfeiffer, Proc. Zool. Soc. 1854, 

 p. 203.— Mon. Pneum. vol. 2, p. 90.— Sow. Thes. 

 Conch, vol. 3, pi. 264, f. 2. 



Ceylon. 

 Near the last, but has less convex whorls. 



3. C. Blanfordi, Dohrn, Proc. Zool. Soc. 1862, p. 

 202.— Pfeif. Mon. Pneum. vol. 3, p. 88: Novit. 

 Conch, vol. 1, pi. 58, f. 11, 12, 13. 



Bollegalle in Ceylon. 



4. C. hsemastoma, Pfeiffer, Proc. Zool. Soc. 1856, 

 p. 391.— Mon. Pneum. vol. 2, p. 89.— Sow. Thes. 

 Conch, vol. 3, pi. 264, f. 11. 



Ceylon. 



5. C. decorus, Benson, An. Nat. Hist. 1853 (ser. 2, 

 vol. 12, p. 96).— Sow. Thes. Conch, vol. 3, pi. 204, 

 f. 13. 



Ceylon. 



6. C. Thwaitesii, Proc. Zool. Soc. 1852, p. 147.— 

 Mon. Pneum. vol. 1, p. 138. — Sow. Thes. Conch, 

 vol. 3, pi. 264, f. 15. 



Ceylon. 



7. C. Austenianus, Benson, An. Nat. Hist. 1853 

 (ser. 2, vol. 12), p. 95. — Pfeif. Mon. Pneum. vol. 2, 

 p. 88.— Sow. Thes. Conch, vol. 3, pi. 264, f. 9. 



Henerat Jodde, Ceylon. 



8. C. Layardi, Gray, MSS. in Pfeif. Proc. Zool. 

 1852, p. 100, pi. 13, f. 6.— Pfeif. Mon. Pneum. pt. 

 2, p. 87.— Sow. Thes. Conch, vol. 3, pi. 264, f. 7. 



Ceylon. 



9. C. aiireus, Pfeif. Proc. Zool. Soc. 1855, p. 118: 

 Mon. Pneum. vol. 2, p. 88. 



Ceylon. 



10. C. Caleadensis, Blanford, J. Asi. Soc. Beng. 



1809 (vol. 38, pt. 2), p. 137, pi. 16, f. 8. 



Calcad Hills, beyond the limits of Travancore. 



Our example (named by the author) somewhat 

 differs from the figure in the journal, but the species 

 is said by Blanford to be very variable. 



PLATE CVII. 

 UNIO. 



See previous plates ix to xii, xli to xlv. 



1. U. Indicus, Sowerby, in Eeeve's Conch. Icon. 

 Unio, f. 222. 



Nerbudda River. 

 As yet so rare a shell, that we have seen only two 

 adult specimens of the normal form. 



2. IT. triembolus, Benson, An. Nat. Hist. ser. 3, 

 vol. 10 (Septem. 1862), p. 190. 



Nerbudda River. 



3. U. favidens, var. Benson. See Plate XL f. 3. 



Near the " Seven Tanks," Calcutta. 

 This dwarf form ranges between pinax and pla- 

 giosoma. Our figured example is solid, and displays a 

 strongly marked sculpture, but we possess others 

 (which remind us of the unrecognised Rajahensis) that 

 are almost smooth, and comparatively fragile. 



4. IT. Indicus, var. aurea, Sowerby. 



Nerbudda River. 

 Possibly the link between Indicus and Triembolus. 



5. tr. exolescens, Gould, Proc. Nat. H. Boston, 

 vol. 1, p. 141 : Otia Conch, p. 191. 



Tavoy, Birmab. 

 Of the two examples received from Gould, the 

 larger (a more beaked form) was in too bad a con- 

 dition to be delineated ; the one we have figured is 

 immature. The general aspect of the species reminds 



