374 MR. H. ADAMS ON PERUVIAN SHELLS. [May 26, fourth of the height of the third suborbital bone is left uncovered. My reason for supposing this fish may be Opsarius malaharicus, Jerdon, is that I found it very numerous, as Jerdon remarks, in "the streams that run from the Western Ghauts into North Malabar," and that it was the only species of the genus which 1 could find there, whilst the difference is that the 0. malaharicus is said to have four-teen dorsal rays. If they are not the same, Jerdon has entirely over-looked this common species, which I think is very improbable; con-sequently D. 14 I believe to be a misprint for D. 10. Barilius canarensis. Opsarius canarensis, Jerdon. B.iii. D, 2/10. P. 15. V. 9. A. 2/13. C. 21. L.1.38. L. tr. 9/4. Length of head f, of caudal |, height of body \ of the total length. Eyes. Diameter j of length of head, more than one diameter from end of snout. This species is very similar to the B. gatensis, C. & V., differing, however, in a few points : there are a smaller number of rays in the dorsal fin ; the inferior lobe of the caudal is the longest ; the lower jaw is less broad ; and the dorsal commences midway between the snout and the base of the caudal. Scales. Two and a half rows between the lateral line and the base of the ventral fins. Colours. Greenish above with purple reflections, golden on the sides and beneath ; a double row of large green spots along the sides as far as the base of the anal, when they become single ; dorsal, caudal, and anal dark grey, with broad white margins. Ilab. Mangalore. Danio malabaricos, Perilampus malaharicus, Jerdon (male). Perilampus canarensis, Jerdon (female). Are identical with Danio micronema, Bleeker. I obtained numerous specimens in the localities where Dr. Jerdon records having collected his. Danio alburnus, Ileckel, is probably the same, the barbels having been overlooked. 4. List of Additional Species of Land and Freshwater Shells collected by Mr. E. Bartlett in Eastern Peru^ with Descriptions of New Species. By Henry Adams^ F.L.S. (Plate XXVIL) Fam. Melaniid^e. 1. Pachycheilus hians. Lea. 2. ViBEX (Dorissa) AauATiLis, liceve.