58 MOKMYRIDJS. 



10. PETEOCBPHALUS GLIROIDES. 

 Mormyrus gliroides, Vincig. Ann. Mus. Genova, (2) xvi. 1897, p. 353. 

 Petroceplialus gliroides, Bouleng. Proc. Zool. Soc. 1898, p. 790. 



Depth of body 2| times in total length, length of head of times. Head 

 nearly as long as deep ; snout prominent, rounded, hardly \ length of 

 head ; mouth inferior, below anterior third of eye, its width \ length 

 of head; teeth bicuspid, 14 in upper jaw, 24 in lower; eye moderate, 

 slightly shorter than snout, \ length of head, \ interorbital width. 

 Dorsal 27, originating above 3rd ray of anal, at equal distance from head 

 and from base of caudal. Anal 29, equally distant from base of ventral 

 and from base of caudal. Pectoral pointed, § length of head. Caudal 

 peduncle 2\ times as long as deep. About 40 scales in lateral line, ^ in 

 transverse series on body, j| in transverse series between dorsal and anal, 

 12 round caudal peduncle. Greyish above, yellowish beneath. 



Total length 125 millim. 



Between Ganana and Lugh, Somaliland. — Type, in Genoa Museum, 

 examined. 



11. PETROCEPHALUS DEGENI. 



Bouleng. Ann. & Mag. N. H. (7) xvii. 1906, p. 434, and Fish. Nile, p. 39, pi. x. 

 fig. 1 (1907). 



Depth of body 3^ times in the total length, length of head 3f times. 

 Head as long as deep ; snout very short, about ^ length of head, rounded, 



Pig. 43. 



PetroccpJudus degcui. 

 Type (F. N.). 





projecting beyond mouth ; mouth below eye, its width \ length of head ; 

 teeth bicuspid, 10 in upper jaw, 22 in lower; nostrils on a level with 

 lower border of eye ; eye rather large, longer than snout, its diameter 

 4£ times in length of head, once and } in interorbital width. Dorsal 19, 



