1903.] FROM GALLALAXD AND SOUTHERN ETHIOPIA. 331 



JDiscognathics, which may be distinguished by means of the 

 following synopsis : — 



I. Pupil of the eye in the second half of the length 



of the head ; barbels not more than half 

 diameter of eye ; caudal peduncle 1^ to I5 as 

 long as deep ; scales in lateral line 37 to 40. 



Snout projecting strongly beyond the mouth, the 



width of which is less than half the length of 



the head ; upper lip well developed, with a series 



of papilliB forming a fringe D. demheensis Riipp. 



Snout projecting feebly beyond the mouth, the width 



of which equals half the length of the head; 



upper lip scarcel^^ developed, not fringed D.jolinstonii Blgr. 



II. Pupil of the eye in the middle, or anterior to 

 the middle, of the length of the head. 



1. Mental disk well developed, with free posterior 

 border. 

 Barbels f diameter of eye ; eye lateral ; dorsal fin 



equally distant from centre or posterior border 



of eye and root of caudal ; caudal peduncle as 



long as deep ; lat. 1. 35-38 -D. vinciguerrcB Blgr, 



Barbels ^ to f diameter of eye ; eye supero-lateral ; 



dorsal fin equally distant from eye and root of 



caudal, or a little nearer the latter; caudal 



peduncle IJ to li as long as deep ; lat. 1. 33-37. B. hlanfordii Blgr. 

 Barbels | to ^ diameter of eye ; eye lateral ; dorsal 



fin equally distant from end of snout or nostrils 



and root of caudal ; caudal peduncle 1| to If as 



long as deep ; lat. 1. 38-40 D. makiensis Blgr. 



2. Mental disk very indistinct, or reduced to a 

 mere pad, without free posterior border ; 

 barbels i to f diameter of eye ; dorsal fin 

 equally distant from centre or posterior 

 border of eye and root of caudal ; caudal 

 peduncle about li as long as deep ; lat. 

 1. 37-42 D- quadrimaculattis Riipp. 



11. Barb US erlangeri, sp. n. (Plate XXX.) 



Depth of body 3 to 3^ times in total length, length of head 

 3| to 4|^ times. Snout rounded or siibacuminate, prominent, its 

 length 3 to 3| times in length of head ; diameter of eye 3^ (young) 

 to 5 times in length of head, interorbital width 2| to 3 times ; 

 mouth small, inferior, its width i to ^ length of head ; lips well 

 developed, the lower continuous across the chin, forming a small, 

 rounded median lobe ; barbels two on each side, the anterior 

 I the diameter of the eye in the young, 1^ in the adidt, the 

 posterior longer, as long as the eye in the young, twice as long 

 as the eye in the adult, the distance between them measuring 

 ^ (young) to 1 diameter of eye. Dorsal IV 9 ; last simple ray very 

 strong, bony, smooth, its ossified part § to |- the length of the 

 head ; the border of the fin feebly emarginate ; the distance of 

 the dorsal from the occiput equal to or a little less than its 

 distance from the root of the caudal fin. Anal with III 5 I'ays, 

 not reaching, or nearly reaching, the caudal when folded. Pectoral 

 fin pointed, as long as or a little shorter than the head, not 

 reaching ventral; latter originating slightly in advance of first 



