123 MOEMTEID^. 



D. 76-90 ; A. 18-21 ; snout bent down- 

 wards 9. 1/. caschive, L., p. 136. 



D. 83-90 ; A. 17-18 ; snout pointing 



straight forwards 10. iW. niloticus, Bl.-Schn., p. 137. 



2. 22-28 scales round caudal peduncle ; D. 65-77. 



D. 77 ; A. 17 ; L. 1. 130 11. M. hozasi, Pellegr., p. 138. 



D. 65-75 ; A. 17-19 ; L. 1. 85-100 . . 12. M. longirostris, Peters, p. 139. 



3. 18-22 scales round caudal peduncle ; D. 75-91. 

 D. 78-91 ; A. 18-20 ; 20-22 scales round 



caudal peduncle, which is at least half 

 as long as head ; length of snout 2 to 3 



times its least depth 13. il/. rume, C. & V., p. HO. 



D. 75-82 ; A. 19-20 ; 18-20 scales round 

 caudal peduncle, which is not more 

 than I as long as head ; length of snout 

 3^ to 4i times its least depth . . .14. M. prohoscirostris, Blgr., p. 141. 



Mormyrus lacerda, Casteln. Mem. Poiss. Afr. Austr. p. 61 (1861), 

 from Lake Ngami, probably pertains to this genus in the vicinity of 

 M. hasselquistii and anchietce, but the description is insufficient and the 

 type is lost, 



D. 72 ; A. 19. Teeth notched. Grey, upper surface of head black, throat 

 golden yellow ; anal black. Total length 360 millim. ; depth of body 90. 



1. MORMYRUS HASSELQUISTII. 



Mormyrus lierse (non Sonnini), Lacep. Hist. Poiss. v. p. 620 (1803) . 



Mormyrus caschive (non Linn.), I. Geofi'r. Descr. Egypte, Poiss. p. 273, pi. vi. fig. 2 



(1827). 

 Mormyi-us liasselquistii, Cuv. & Val. Hist. Poiss. xix. p. 253 (1846); Marcusen, 



Mem. Ac. St. P(^torsb. (7) vii. 1864, no. 4, p. 130 ; Giinth. Cat. Fish. vi. p. 217 



(1866) ; Bouleng. Proc. Zool. Soc. 1898, p. 813 ; Pappenh. Mitth. Zool. Mas. 



Berl. iii. 1907, p. 360 ; Bouleng. Fish. Nile, p. 59, pi. xi. fig. 1 (1907). 

 Mormyrus guentheri, Bouleng. Proc. Zool. Soc. 1898, p. 814. 

 Mormi/rus ajnus, Pappenh. t. c. p. 361, pi. xiii. figs. 1 & 2. 



Depth of body 4| to 5J times in total length, length of head 4^ to 4f 

 times. Head 1\ to If times as long as deep, with curved upper profile ; 

 snout about ^ as long as postocular part of head, projecting a little 

 beyond mouth, the width of which measures about half length of head ; 

 teeth notched, 8-12 in upper jaw, 12-16 in lower ; eye moderate, f to ^ 

 length of snout or interorbital width. Dorsal 67-75, originating well in 

 advance of ventrals, 4 to 5 times as long as anal. Anal 17-20, originating 



