102 PERCID^. 



tral fins pointed: dcnticiilations of pra3opercnluni obsolete. Brown- 

 ish, with small whitish spots. 



lied Sea ; Isle de France ; Ceylon ; Molucca Sea ; Sumatra ; Timor ; 

 Waigiou. 



a. Adult : skin. Copang (Timor). D. •^. 



b. Adult : stuffed. Isle de France. D. ^. 



c. Adult. Isle de France. From the Collection of the Zoological 



Society. D- n- 



d. Adult : skeleton. Isle de France. From the Collection of the 



Zoological Society. D. —. 



e. Adult : stuffed. Eed Sea. D. ^. 



/. Adult. Sine patria. From the Haslar Collection. 



g. Adult : bad state. Sine patria. From the Haslar Collection. 



h. Half-grown. Amboyna. Purchased of Mr. Frank. 



Sl-eleton. — The crown of the head and the interspace between the 

 eyes are without prominent ridges or deep grooves ; they are narrow 

 and rather fiat. The supraoccipital and the lateral crests are rather 

 low, the former not extending beyond the supraoccipital bone. The 

 two posterior processes of the intermaxillaries are not received into 

 a common groove, but ran on the sides of a narrow longitudinal 

 ridge. The posterior part of the infraorbital arch is narrow, and 

 has inside a broad excavated plate for suppoiiing the eyeball from 

 beneath. The length of the intcrmaxillaiy is about two-thii-ds of 

 that of the maxiUarj" ; it has a flat prominence behind, above which 

 is a deep notch. The maxillary widens from its second third ; the 

 superior margin is nearly straight, the inferior concave ; the sup- 

 plementary bone is exceedingly narroAV. The operculum has three 

 distinct fiat spines, the middle of which is longest and nearer the 

 lower than the superior ; the sub- and interoperculum are without 

 any serrature ; the prteoperculum is rounded throughout, and has 

 some very indistinct serrature at the rounded angle. 



The dentition is rather powei-ful. There are in the upper jaw 

 two very strong canines ; the outer series is formed by shorter, but 

 thicker teeth than the others, and does not extend to the extremity 

 of the bone. Inside of the canines and the series mentioned is a 

 band of villifoim teeth, broadest beliind the canines ; and here also 

 are placed several long and slender teeth of more cardiform appear- 

 ance. The lower jaw is armed in front with a pair of canines, and 

 with another in the middle of its lateral band, l>ut they are rather 

 smaller than those of the upper jaw. In the A-iUiform band several 

 cardiform teeth are visible. The vomerine teeth are arranged in two 

 series, meeting anteriorly at a rather obtuse' angle. The band of 

 palatine teeth is narrow, and does not extend on the pterygoid bone. 



There are ten abdominal and fourteen caudal vertebrce. The 

 interhaeraal is attached to the ha3mal spines of the tenth and eleventh 

 vertebrie ; it is slender, and equals the length of the second to the 

 seventh vertebra. 



