1. MOKMYUIS. 217 



6. Mormyrus hasselquistii. 



Mormyrus herse, Lacep. v. pp. 621-623 (not Sonn.). 



caschive, Geoffr. Descr. Eg. Poiss. i. p. 273, pi. 6. fig. 2. 



hasselquistii, Cuv. 4" Val. xix. p. 253 ; Marcusen, Monnyr. p. 130. 



D. 70. A. 18. L. lat. 115. Vert. 21/29. 



Snout rather thick and obtuse, with the upper jaw somewhat pro- 

 jecting beyond the lower. Eye situated in the anterior third of the 

 length of the head, which is one-fourth of the total (without caudal). 

 Teeth very small, with their crown slightly emarginate. 



Nile ; West Africa. 



a. Half-grown. West Africa. Purchased of Mr. Dalton. 



7. Mormyrus macrophthalmus. 

 D. 64. A. 21. L. lat. 88. 



Snout much shorter than in M. caschive and in the other species 



allied to it; it is compressed, and abruptly bent downwards, the 



upper profile of the head being strongly curved ; it is not much longer 



than the eye, which is large, two-sevenths of the length of the head. 



Jaws equal anteriorly, armed with small teeth, which are dilated and 



truncated at their summits. The length of the dorsal is not quite 



one-half of the total ; anal much higher than dorsal, its distance from 



the caudal being one-fourth of the total length. Caudal forked to 



[the base, with the lobes slender and pointed. The pectoral extends 



I to, or nearly to, the root of the ventral, the length of which is two- 



tthirds of that of the pectoral. The height of the body is one-fifth of 



the total length (without caudal), the length of the head one-sixth. 



Coloration uniform, sides shining silvery. 



West Africa. 



a. Male, 13 inches long. Purchased of Mr. Dalton. 



II. Dorsal and analjins suhequal and moderate in length ; stiout long, 

 dcciirvcd. 



8. Mormyrus tamandua. 



Mormyrus tamandua, GUnth. Proc. Zool. 6'oc. 1801, Januarv, pi. 2. 

 fig.l. 



D. 28. A. 31. L. lat. 80. 

 Snout much prolonged, tubiform, tapering and curved downwards ; 

 the lower jaw terminating in a short skinny fiap as long as the eye. The 

 distance between the eye and the gill-opening is half that between 

 eye and the end of the mandibulary flap ; eye rather small. Teeth 

 very small, conical, few in number. Pectoral nearly twice as long 

 as the ventral, extending beyond its base. The height of the bodj' 

 is two-ninths of the total length (without caudal), the length of the 

 head one-fourth. 



West Africa. 

 a. Tj-pe of the species. Purchased of Mr. Dalton. 



