502 . PHTSOSTOMI. 



Rahitat. — Rivers below Darjeeling. I was given some specimens np to 3\ incites long, by Dr. 

 Stoliczka, wbo obtained tbem from that locality. 



3. Ezostoma Berdmorei. 



Blytb, P. A. S. of B. 1860, p. 156 ; Giintber, Catal. v, p. 265 ; Day, Proc. Zool. Soc. 1869, p. 526. 



D. i I 0, P. ^, V. 6, A. 6, C. 14. 



Maxillary barbels reacb tbe base of tbe pectoral fin. The snout is much more pointed tban in the other 

 species. Fms—cMiA&l rather deeply forked. Ooloms — " dingy olive-brown, with obscure dark broad bands, 

 presenting more or less of a clouded appearance : the fins mostly darker, below pale." 



Habitat. — Tenasserim. The typical'specimen (4 inches long) in the Calcutta Museum, is in such a very bad 

 state of preservation that I cannot add more to Blyth's description. 



4. Exostoma Stoliczkae, Plate CXVII, fig. 3. 

 Day, Proceedings Zoological Society, 1876, p. 782. 

 D. i 1 0, P. 1/12, V. 6, A. 6, C. 15. 



Length of head from 4 in the young* to 5f in the adult, of caudal 8, height of body 7j in the total 

 length. Eyes — minute, situated in the middle of the length of the head : the width of the interorbital space 

 equals half the length of the snout, or the distance between the eye and the front nostril. Head depressed, as 

 broad as long, and obtusely rounded. Mouth inferior : lips thick, and studded with small tubercular elevations : 

 the upper and lower lips continuous at the angle of the mouth, but the transverse fold across the lower jaw is 

 interrupted in the middle. Nostrils close together, the anterior round and patent, the posterior tubular ; a 

 barbel divides the two nostrils, it is situated on a bridge of skin, below which the two nostrils are continuous. 

 Barbels — the nasal ones reach the hind edge of the eye : the maxillary ones ha.ve a broad basal attachment, and 

 reach the root of the pectoral. Of the mandibular barbels the anterior are situated just behind the inner end 

 of the lower labial fold : they are shorter than the outer pair, which latter extend to the gill-opening. Gill- 

 opening situated on the side of the head in front and above the base of the pectoral fin. TfeeiSr— several rows 

 of pointed ones in each jaw, of which the outer is slightly the larger, rather wide apart, and with rather obtuse 

 summits. Fins — ^the dorsal arises midway between the snout and the commencement of the adipose fin • its 

 greatest height is one-third more than the length of its base : its spine is rudimentary and enveloped in skin. 

 Adipose dorsal very long and low, posteriorly in some instances it is free, in others it almost appears to decrease 

 in height and join the free portion of the tail. Pectoral nearly as long as the head, having its outer half 

 horizontal and its inner vertical : its spine is rudimentary, with a broad, striated, cutaneous covering. Ventral 

 of a similar form to the pectoral ; its first and a portion of its second ray also with a striated cutaneous 

 covering : the fin commences on a vertical line falling just behind the base of the dorsal fin : it is rather nea:j'er 

 the snout than the posterior end pf the adipose dorsal, and commences midway between the bases of the 

 ventral and caudal fins : it is half higher than long. Caudal cut almost square. Free portion of the tail one-half 

 higher than long. Shin — tuberculated from the head along the lower surface of the body to nearly as far as 

 the bases of the ventrals. Golowrs — of a duU yellowish green, becoming lightest along the abdomen. Fins 

 yellowish, with dark edges or bands. 



Habitat. — Lek or Ladak, and along the head waters of the Indus, attaining about 7 inches in length. 



* The remarkable difference in the comparative length of the head to that of the total is shown in the followmg figures :— 



3 specimens 4 inches in length. Head 4 to 4|. in the total length. 



4 „ 4'2to4-5 „ „ 4^to5J 



5 „ 50 to 5-7 „ „ 5 to5i 



3 „ 6-0 to 6-6 „ „ 5J to SJ „ 



2 „ 7 „ „ 5ito6J 



