Freshwater Fishes from Southern Cameroon. 439 
Allabenchelys brevior. 
Depth of body 8 to 83 times in total length, length of head 
og to 54 times. Head about 14 as long as broad, smooth 
above, the bony casque, in the middle, nearly half the width 
of the head; supraoccipital process acutely pointed ; a mode- 
rately large sole-shaped frontal fontanelle ; occipital fontanelle 
a little smaller, partly on the occipital process ; eye small, its 
diameter twice and a half in length of snout, 5 times in inter- 
orbital width; band of premaxillary teeth 4 times as long as 
broad ; vomerine teeth conical, in a crescentic band, which in 
the middle is as broad as the preemaxillary band. Nasal 
barbel about 2 the length of the head, maxillary ? to 3, outer 
mandibular 3, inner mandibular 3. Gill-rakers moderately 
long, 12 on anterior arch. Clavicles hidden under the skin. 
Dorsal fin with 65 or 66 rays, anal with 60 to 62, both 
narrowly separated from the caudal; the distance between the 
origin of the dorsal and the occipital process 2 the length of 
the head. Pectoral half the length of the head ; spine feebly 
serrated on both sides, 2 the length of the fin. Ventrals 
small, twice as distant from the root of the caudal as from the 
isthmus. Caudal nearly half the length of the head. Olive- 
brown above, yellowish beneath. 
Total length 150 millim. 
‘Two specimens from the Ja River. 
The shorter caudal region and the correspondingly shorter 
dorsal fin are the principal characters by which this species 
can be distinguished from A. longicauda, Blegr., also discovered 
by Mr. Bates in the Ja River. 
Phractura longicauda. 
Depth of body 14 times in total length, length of head 64 
times. Head 14 as long as broad, the slightly rugose skull 
covered with very thin skin; snout half length of head, 
pointed, projecting a little beyond the mouth; space between 
the two nostrils at nearly equal distance from the end of the 
snout and from the eye; eye supero-lateral, its diameter 6 
times in length of head, once and a half in interocular width ; 
barbels papillose, maxillary and outer mandibular subequal, 2 
length of head, inner mandibular 4; occipital process acumi- 
nate, about twice as long as broad, widely separated from 
the small interneural shield. Dorsal I 6, first ray longest, 
spinulose, as long as head; second dorsal very small, origi- 
nating above last rays of anal. AnalI16. Pectoral slightly 
longer than head, not reaching root of ventral. Caudal 
peduncle depressed, very slender, ? total length. 25 dorsal 
29* 
