244 Mr. G. A. Boulenger on new 



Total length 1770 mm. ; tail 250. 



A single male specimen. 



This snake can only be compared with C. schrenckii, 

 Strauch, from Corea and Eastern Siberia, but it differs in the 

 number of upper labial shields, the mostly single subcaudals, 

 and in other points of minor importance. 



XXII. — Descriptions of Three neio Gyprinid Fishes from 

 East Africa, ^y G. A. Boulenger, F.R.IS. 



(Published by permission of the Trustees of the British Museum.) 



Laheo gracilis. 



Body strongly compressed, its depth -k^ to 4f times in 

 total length. Head 4^ times in total length ; snout rounded, 

 as long as postocular part of head ; eye perfectly lateral, 

 3^ times in length of head ; interorbital width \ length of 

 head ; width of mouth, with lips, 3^ times in length of head ; 

 lips rather feebly developed, without transverse plicse, with a 

 fringe of conical papillse ; edge of rostral flap entire ; a small 

 barbel. Dorsal III 10-11, equally distant from nostril and 

 from caudal, upper edge concave^ longest ray as long as head. 

 Anal III 5, not reaching caudal. Pectoral slightly shorter 

 than head, not reaching ventral, which is inserted below 

 middle of dorsal. Caudal deeply notched, crescentic. 

 Caudal peduncle once and a half as long as deep. Scales 

 40-42 %, 4 between lateral line and ventral, 16 round caudal 

 peduncle. Dark brown above, whitish beneath. 



Total length 120 mm. 



Three specimens from the Juba River near Gobwen, 

 collected by Mr. A. Blayney Percival. Types in the British 

 Museum and in the Nairobi Museum. 



Allied to L. mesops, Gthr., but body more elongate, eye 

 larger, and mouth smaller. 



Barbus procatopus. 



Depth of body equal to length of head, 3| to 4 times in 

 total length. Snout rounded, 3 to 3^ times in length of 

 head ; eye 3^ to 3^ times in length of head, interorbital width 

 3^ times; mouth inferior, its width 4 times in length of head ; 

 lips moderately developed, lower uninterrupted ; two barbels 

 on each side, posterior a little longer than anterior and as 



