3. MOKMTROPS. 223 



2. Hyperopisus occidentalis. 



Very similar to H. dorsaUs. 



D. 12. A. 65. y. 6. L. lat. ca. 110. 



Snout obtuse, rather short, rounded, with the jaws equal anteriorly, 

 and without labial appendage. Eye small, situated far before the 

 middle of the length of the head. Teeth as in H. dorsalis, but rather 

 smaller. Pectoral fin extending beyond the root of the ventral, which 

 is short and half as long as the pectoral. The height of the body 

 is contained four times and one -half in the total length (without 

 caudal), the length of the head five times and one-half. The dis- 

 tance of the origin of the dorsal Jin from the root of the caudal is con- 

 siderably less than one-half of its distance from the gill-opening. 



West Africa. 



a. Sixteen inches long. Purchased of Mr. Dalton. 



3. MORMYROPS. 



Mormyi'us, sp., L. 



Mormyrops, sp., Miiller, Berl. Ahhandl. 1844, p. 190. 

 Isichthys et Marcusenius, Gill, Proc. Acad, Nat. Sc. Philad. 1862, 

 p. 443. 



Head elongate, about twice as long as high. No teeth on the 

 palate or on the tongue. 



1. Mormyrops anguilloides. 



Herse, Sonnini, Voy. Eg. pi. 22. fig. 1 ; Rifavd, Voy. Eg. pi. 189. 



no. 40 (bad). 

 Mormyrus anguilloides, L. Mus. Ad. Frid. p. 110, and Syst. Nat. i. 



p. 522 (not synon.) ; Geoffr. Descr. Eg. Poiss. i. p. 274, pi. 7. fig. 2 ; 



Cuv. 8f Val. xix. p. 258 ; Marcusen, Mormyr. p. 132. 

 dendera, Lacep. v. p. 621. 



D. 26-28. A. 39-42. V. 6. L. lat. 95. Vert. ||. 



36 



Head nearly twice as long as high ; snout subtetrahedral, of 

 moderate length, rounded in front, with the upper jaw a little longer 

 than the lower. Eye very small, situated in the anterior third of 

 the length of the head. Teeth not very small, fixed, forming a 

 curved series in both jaws, slightly notched at the apex. Dorsal fin 

 more than half as long as the anal. The height of the body is con- 

 tained from five times and a half to six times and a half in the total 

 length (without caudal), the length of the head four time 



Nile. 



a. Half- grown. Egj^t. From Dr. Riippell's Collection. 

 h. Half-grown. Nile, below the Cataracts. From Mr. J. Petherick's 

 Collection. 



