ALLABENCHELTS. 



267 



length of head, inner \ to f . Gill-rakers moderately long, 10 to 12 

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

 distance from occipital process § to f length of head. Anal 60-65. 

 Both dorsal and anal narrowly separated from caudal. Pectoral about 

 \ length of head, its spine feebly serrated on both sides and \ to § the 



length of the fin. 



Ventrals 1^ to 1§ 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. 



1-2. Types. Ja R. 

 3-4. Ad. 



5. Skel. „ 



6-9. Ad. & hgr. Nyong R. 



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



Fig. 222. 



2. ALLABENCHELYS LONGICAUDA. 

 Bouleng. Proc. Zool. Soc. 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 



times. Head 1\ to lij times as long as 

 broad, smooth above, the bony casque, 

 in the middle of the head, ^ width of 

 head ; postorbital bone narrow ; occipital 

 process acutely pointed ; a small frontal 

 fontanelle ; occipital fontanelle very in- 

 distinct ; eye very small, 3 to 4 times in 



Allabenchelys lowjicauda. 

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



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

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

 broad; vomerine teeth conical or subgranular, forming a crescentic 



