SILURID/E. .-;i3 



a little more than ^ length of head ; eye supero-lateval, 8 times in 

 length of head, 2^ in interorbital width ; mouth small, inferior, with 

 thick papillose lips; prsemaxillary teeth in a small reniform group. 

 Maxillary and inner mandibular barbels not quite | length of head, 

 outer mandibular nearly as long as head. Gill-rakers moderately long, 

 6 on lower part of anterior arch. Humeral process narrow, pointed, 

 smooth. Dorsal I 7 ; spine strong, smooth, f length of head ; longest 

 rays | length of head. Adipose dorsal 5 times as long as deep, nearly 

 twice as long as its distance from rayed dorsal, not extending to root of 

 caudal. Anal 12 (8 branched rays). Pectoral not reaching ventral, 

 ventral not reaching anal. Caudal rounded. Brownish, with round 

 black spots forming four longitudinal series on the body ; belly white ; 

 dorsal and caudal fins with numerous round black spots. 



Total length 200 millim. 



Nyong River, South Cameroon. 

 1- Type. Akonolinga, Nyong C. G. L. Bates, Esq. (C). 



Distinguished from A. hallayi by the longer, narrower head. 



24. NOTOGLANIDIUM, Gthr. 

 la. NOTOGLANIDIUM THOMAS!, sp. n. 

 Depth of body 5 to oj times iu total length, length of head 3^ times. 

 Head much depressed, l^ times as long as broad, smooth above ; snout 



broadly rounded, shorter than postocular part of head ; posterior nostril 

 nearer eye than end of snout; eye very small, 11 times iu length of 

 head, 5 times in interocular width. Maxillary barbel f length of head, 

 inner mandibular ^, outer mandibular nearly as long as head. Prae- 

 maxillary teeth forming a small reniform group. Dorsal 1 12-13, low, 

 equally distant from end of snout and from root of caudal ; spine short, 

 with a few serrse; anterior soft rays short and more widely spaced than 



