1900.] FISHES FROM THE GAMBIA. 515 



disposed with greater or less regularity at considerable intervals ; 

 caudal fin with numerous small round blackish spots. 



Total length 490 millim. 



Three specimens. 



This species is most nearly allied to S. nigrita C. & V., from the 

 Senegal, from which it differs, however, in the larger adipose fin 

 and the longer and more slender branches of the mandibular 

 barbels, as well as in the presence of the ocellar spots on the body. 



" Never found in main river ; chiefly taken in the Kunchow 

 Creek. Eye-spots very bright black with white centre. Upper 

 parts brown." 



29. Malopterurus electricus Gm. 



" Is known to the natives of the Gambia by the name of ' Tingo.' 

 It is common. The largest specimen seen was 14 inches in length. 

 Two small specimens 3 inches in length were kept alive for 

 several weeks in an aquarium ; they appeared to browse on the 

 alga3, and were capable when even so small of giving a very 

 considerable shock." 



MuGILIDjE. 



30. Mugil EALCiprjsmrs C. & V. 



" Taken frequently in the Kunchow Creek. No fish in the river 

 can compare with this as food, most of the river-fish being soft- 

 fleshed and tasteless."' 



PoLYNEMIDjE. 



31. PoLYNEMUS QTTADRIFILIS C. & V. 



SpHYRjENLDjE. 



32. Sphyr^ena guachancho C. & V. 



Ophiocephalid^e. 



33. Ophiocephalus obscurus Gthr. 



" Called by the natives ' Pattukoma ' or ' sleeping-fish,' from a 

 curious habit it has when caught in shallow pools by draining the 

 water : it does not attempt to get to the deeper parts of the pools 

 but lies stranded as though dead. If placed in deep water it will 

 suddenly dart away. In these pools it bears from above a striking 

 resemblance to Polypterus, with which it is generally found." 



Gobiid^;. 



34. Eleotris senegalensis Stdr. 



CaRANGIDjE. 



35. Trachynotus otatus L. 



SCTjENIDjE. 



36. CORVINA NIQRITA C. & V. 



