3."U) Mr. G. A. Boulcngcr on Fishes, Batrachianit, 



mental barbel ^ the diameter of the eye. Gill-rakers long and 

 slender, 11 on lower p.art of anterior arch. First dorsal with 

 five feeble simple rays, the first the longest and measuring ^ 

 the length of the head. Second dorsal much more developed 

 than and narrowly separated from the first, with 12 rays, all 

 branched except the first ; second and third longest, as long as 

 the head. Third dorsal with 38 short feeble rays, its base 

 shorter than its distance from the second dorsal. Anal 

 originating a little in advance of the second dorsal, composed 

 of 103 subequal rays, which measure about \ the length of 

 the head. Pectoral rather high up the side, with 15 rays, 

 about f the length of the head. Longest ventral ray 1^ 

 the length of the head. Caudal fin obtusely pointed, half the 

 length of the head. 140 scales in a longitudinal series, 17 

 between the origin of the second dorsal fin and the lateral 

 line, which is perfectly distinct. Yellowish brown, finely 

 speckled with dark brown ; abdominal region bluish black. 



Total length 210 mlllim. 



I am indebted to Dr. J. D. F. Gilchrist for the favour of 

 describing this most interesting fish, with which it gives me 

 great pleasure to connect the name of its discoverer. The 

 single specimen sent to me was obtained some 40 miles off 

 Tabic Mountain, at a depth of 250 fathoms. 



LVI. — List of the Fishes, Batrachians, and Beptiles collected 

 by the late Mr. P. 0. Simons iii the Provinces of Mendoza 

 and Cordova, Argentina, ^j G. A. BOULENGER, F.R.S. 



Fishes. 



1. Trichomyclerus Borellii, Blgr. — Rio Mendoza, Palmira, 



900 m. 



2. Trichomyclerus Burmeisteri, Berg. — Rio Mondoza, Pal- 



mira, 900 m. 



3. Jenynsia pygogramma, sp. n. 

 D. 8-9. A. 9-10. L. lat. 32-35. 



Closely allied to J. lineata, Jen., but scales on the back 

 much smaller, 18 to 25 transverse series between the occiput 

 and the dorsal fin. Depth of body equal to length of head 

 and contained 4 times in tot:il length. Golden yellow above, 

 speckled and spotted with black, white beneath; a more or 



