ALLABENCHELYS. 



267 



length of heaO, inner J to |. Gill-rakers moderately long, 10 to 12 

 on anterior arch. Clavicles hidden under the skin. Dorsal 65-75, its 

 distance from occipital process f to f length of head. Anal 60-6-3. 

 Both dorsal and anal narrowly separated from caudal. Pectoral about 

 ^ length of head, its spine feebly serrated on both sides and ^ to f the 

 length of the fin. Ventrals 1\ to If times as distant from root of 

 caudal as from end of snout. Caudal ^ to f length of head. Olive- 

 brown above, yellowish beneath; anal with a light edge. 



Total length 205 millim. 



South Cameroon. 



Ja R. G. L. Bates, Esq. (C). 



1-2. Types. 

 3-4. Ad. 



5. Skel. 



G-9. Ad. & hgr, 



Nyong R. 



2. ALLABENCHELYS LONGICAUDA. 

 Bouleng. Proc. Zool. Soo. 1902, i. p. 234, pi. xxii. fig. 1, and 1907, p. 1092. 

 Depth of body 9 to 12 times in total length, length of head 5^ to 6 

 -p ^22 times. Head IJ- to IJ times as long as 



broad, smooth above, the bony casque, 

 in the middle of the head, J width of 

 head ; postbrbital bone narrow ; occipital 

 process acutely pointed ; a small frontal 

 fontanelle ; occipital fontanelle very in- 

 distinct; eye very small, 3 to 4 times in 



Allabenchelys lomjicuada. 

 Type (P. Z. S. 1902). f . 



length of snout, 6 times in interorbital width, whicli is not quite 

 4 length of head ; band of prsemaxillary teeth 4 to 5 times as long as 

 broad; vomerine teeth conical or subgranular, forming a crescentic 



