8 THE HANCOCK PACIFIC EXPEDITIONS 



VOL. 



Teeth in upper jaw in a strong outer row which extends back- 

 ward to opposite middle of palatine patch, and a series of extremely 

 minute inner teeth. Vomer with four strong teeth arranged in a 

 square. Palatine patches with two rows of teeth, the patches being 

 elongate-oval in shape. Teeth of lower jaw in a single strong outer 

 row with a fe^'^ very small teeth set in two irregular rows behind 

 the main one at front of jaw. Both upper and lower jaws are rather 

 expanded and flattened in front (the symphyses indented) and then 

 rather suddenly constricted as the rami turn and run backwards. 

 This formation of the jaws is apparently that described by Beebe 

 and Tee-Van (in other species) as that of an old-fashioned key-hole. 

 It might better be described as like the jaws of Hippopotamus. 

 The main jaw teeth are strong though rather short, pointed, and 

 slightly compressed in front. The front teeth in each jaw flare 

 outward slightly. 



Entire front of upper part of head, forward of the vertical of the 

 posterior rim of orbit, covered with fine blunt spines. The spinous 

 area includes the whole frontal and preocular region, the suborbitals, 

 and a patch on top of the head behind the eyes extending backward 

 in a blunt point toward (but not reaching) the vertex of the supra- 

 occipital region. The interorbital is strongly concave, forming a 

 trough in the middle, and is armed with three rows of spines on 

 each side, the outer row being part of the single circumorbital spiny 

 ring. This ring is complete except directly behind the eye. Orbital 

 tentacle short, apparently simple. Nasal tentacle longer and multifid, 

 but not as long as that of A. arborescens. Opercle and preopercle 

 naked. A group of five or six pores on either side of nape about 

 opposite origin of dorsal fin. Opercle ends above in a free, hook-like 

 membrane supported by the branchiostegal rays, which reach notably 

 above the point of attachment of the gill-cover. 



Vertical fins of moderate height, soft rays longer than spines, the 

 last rays attached at caudal base by a membrane. Origin of dorsal 

 above preopercle, directly at base of cranium, which has no supra- 

 occipital crest. Pelvics inserted in front of pectoral base. 



Body light straw-colored, the head blackish with darker spots 

 and lighter marblings, the principal dark area being a large hourglass- 

 shaped saddle set transversely across the occiput and extending 

 down on opercles to opposite lower rim of eye. About four brown 

 dots on margin of opercle. Body with two main longitudinal rows 



