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 malabaricus, 
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 I could find there, 
whilst the difference is that the O. malabaricus 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 2, of caudal 2, height of body j of the total length. 
Eyes. Diameter } 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. 
Hab. Mangalore. 
DANIO MALABARICUS. 
Perilampus malabaricus, 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, Heckel, 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 Apams, F.L.S. 
(Plate XXVII.) 
Fam. MELANIID. 
1. PacuycuEILus uns, Lea. 
2. Visex (Dorissa) aauariis, liceve. 
