330 ME. G. A. BOULENGER Olf FISHES [NoV. 17, 



7. Labeo cylixdricus Peters. 



Two specimens, measuring 64 and 1 50 millimetres respectively, 

 from the Modjo River. Diameter of eye 4^ and 5 times in length 

 of head. D. Til 9. Sq. 35-37 |, 4, 16. 



8. DiscoGNATHUs MAKiExsis, sp. n. (Plate XXXI. fig. 1.) 

 Body feebly compressed, its depth 5 to 6 times in the total 



length. Head as broad as deep, 1^ as long as broad, 1 to | total 

 length ; snout rounded, projecting beyond the mouth ; inter- 

 orbital region convex, its width not quite half the length of the 

 head ; eye lateral, but better visible from above than from below, 

 in the middle of the length of the head, its diameter 4 to 5| times 

 in the length of the head and twice to twice and a half in the 

 interorbital width ; width of mouth not quite ^ the length of the 

 head ; upper lip well developed, not fringed ; lower lip forming a 

 mental disk which is broader than long ; two barbels on each 

 side, measuring f to 4 the diametei- of the eye. Dorsal with 

 10 rays, 7 of which are branched, equally distant from the end of 

 the snout or the nostrils and fi-om the root of the caudal ; first 

 branched ray longest, a little longer than the head. Anal II 5, 

 first branched ray longest, | to f the length of the head. Pectoral 

 as long as or slightly longer than the head, not reaching the ventral, 

 which is situated below the middle of the dorsal. Caudal fin 

 deeply emarginate, longer than the head. Caudal peduncle Ig to 

 1| as long as deep. Scales 38-40 ^, 3g or 4 between the lateral 

 line and the ventral, 16 round the caudal peduncle. Olive above, 

 white beneath. 



Six specimens, measuring from 48 to 80 millimetres. Maki 

 River, running into L. Zwai. 



9. DlSCOGSTATHUS BLANFORDII Blgr. (Plate XXXI. fig. 2.) 

 Several specimens from the Gadschimboda R., affluent of the 



Hawash. 



10. DiSCOGNATHUS QUADRIMACULATUS Rupp. 



Several specimens from the Gadschimboda and Suksuk Rivers. 



Eye in the middle of the length of the head, its diameter 3| 

 (yoving) to 5 times in the length of the head ; barbels | to |- the 

 diameter of the eye; mental disk small, feebly marked, a little 

 longer than broad. Scales 39-42 'rf, 4 between lateral line and 

 ventral. The largest specimen is 55 millimetres long. 



Described fi-om Abyssinia by Riippell under the names of 

 Gobio quadrimaculatus and G. hirticejis. Young specimens from 

 Lake Arsade, south of Shoa, have been described by Vinciguerra 

 as Discognathus chiarinii. 



We are now acquainted with six African species of the genus 



