198 MR. G. A. BOULENGER ON [Feb. 2, 



the eye and from th end of the snout ; eye longer than the snout, 

 I length of head, |- interorbital width. Dorsal circa 32 *, a 

 little shorter than its distance from the head, longest rays 

 f length of head. Anal 25, originating below 11th ray of 

 dorsal, nearer base of caudal than base of ventrals ; longest rays 

 f length of head. Pectoral pointed, a little shorter than the 

 head, once and | the length of the ventral, and extending beyond 

 the vertical of the base of the latter. Caudal with pointed lobes. 

 Caudal peduncle 3 times as long as deep, as long as head. 

 67 scales in the lateral line, j^ in a transverse series on the body, 

 ^ in a transverse series between dorsal and anal, 12 round caudal 

 peduncle. Pale brownish above, silvery white beneath ; head 

 closely dotted with dark brown ; a pair of dark brown l)ars across 

 the nape. 



Total length 190 millim. 



A single specimen from Assay, Southern ISfigeria-. 



This species is nearly allied to M. 2^&therici Blgr., from the 

 Upper N'ile, and to M. jjsittacios Blgr., from the Congo. 



Gnathonemus gilli. (Plate YII. fig. 2.) 



Depth of body 3f times in total length, length of head 5|- times. 

 Head slightly longer than deep, with curved uppei' profile ; snout 

 I length of head ; mouth small, on a, line with the lower border 

 of the eye ; chin with a globular dermal appendage ; teeth minute, 

 conical, 3 in the upper jaw, 4 in the lower ; eye a little shorter 

 than snout, 4| times in length of head, once and | in interorbital 

 width. Dorsal 33, its origin corresponding to that of the anal, 

 its length once and g in its distance from the head. Anal 31, 

 equally distant from base of ventrals and from base of caudal. 

 Longest rays of dorsal and anal | length of head. Pectoral 

 pointed, as long as the head, once and | as long as the ventral, 

 reaching beyond the base of the latter. Caudal scaled in its basal 

 half, with pointed lobes. Caudal peduncle 4 times as long as deep, 

 slightly longer than the head. 85 scales in the lateral line, ^5 ii^ 

 a transverse series on the body, ^y in a transverse series between 

 dorsal and anal, 14 round caudal peduncle. Brown above, silvery 

 white beneath ; dorsal and anal fins greyish brown in front. 



Total length 245 millim. 



A single specimen from Assay, tSouthern Nigeria. 



This new Mormyr, named in honour of the founder of the 

 genus Gnathonemus, Dr. Theodore Gill, of Washington, occupies 

 an intermediate position between the species in which the anal 

 fin originates in advance of the doi'sal {G. Gyj>rmoides L., mento 

 Blgr., monteiri Gthr., &c.), and those in which the reverse is the 

 case {G. iissheri Gthr., greshoffi Schilth.). 



* The dorsal was injiu-ed during life in the specimen here described. 



