SILTHUtt/E. 



107 



lin with one spine and six rays; the adipose of moderate extent. 

 Pectoral with its inner third vertical, its lower two thirds horizontal, 

 its spine feebly serrated. Ventral horizontal, having six rays, and 

 situated- below the dorsal. Caudal einarginate. Air-bladder in 

 rounded lateral portions enclosed in bone. 



This genus 1 is evidently adapted for an existence in rapids. 



113. (1.) Pseudecheneis snlcatus. (Fig. 44.) 



Glyptosternon sulcatus, McClelland, Cal Journ. Nat. Hist, ii, p. 587, 



pi. vi. . 



Pseudecheneis sulcatus, Day, Fish. India, p. 500, pi. cxvi, fig. 1 



(see synon.). 



D. 1/6 1 0. P. 1/13. V. 6. A. 11-13 (2-4/7-9). C. 17. 



Length of head 7|, of caudal fin 6, height of body 6 in the total 

 length. Eyes small, situated midway between the hind edge of 

 the opercle and the nostrils ; the width of the interorbital space 3| 

 in the length of the head. Lower surface of the head with 

 numerous papillae, especially near the symphysis. The width of 



Fig. -44'. P&eutkch&neis si'Jcattis. 



the head equals its length, Barbels the maxillary pair equal to 

 about one third of the length of the head. Fins spine of anterior 

 dorsal broad, weak, crenulated posteriorly; base of the adipose dorsal 

 as long as the interspace between the two dorsal fins. Pectoral 

 large and extending to above the base or first third of the ventral ; 

 pectoral spine broad, finely ctenoid externally in its lower half, 

 crenulated internally, especially in its posterior soft termination. 



