40 8QUAMIP1NNES. 



protuberance above each orbit, none on the neck. The upper sur- 

 face of the snout and a band between the orbits black. Body with 

 two bi'oad bhick bauds : the anterior from the first foiu- dorsal spines, 

 toucliing the hind margin of the operculum, across the root of the 

 pectorals to the belly, including the ventrals, which are deep black. 

 The posterior band from the fifth, sixth and seventh dorsal spines 

 descending obliquely backwards, and occupying the posterior half of 

 the anal fin ; the anterior half is black-edged. 



From the Mauritius through all the East Indian Seas to the I^.W. 

 coast of Ai;stralia. 



a. Large specimen : skin : not good state. Ceylon. From Dr. E. 



F. Kelaart's Collection. 



b, c. Fine specimens. AmbojTia. PiU'chased of Mr. Frank. 



d. Adult: skin. Port Essington. From Mr. Macgillivray's Col- 



lection. 



e. Half-grown : not good state. Australia. 

 /. Adult. Furchased of Mr. Frank. 



g. Large specimen. Purchased of Mr. Frank. 



h. Adiilt. From the Haslar Collection. 



i. Adult. From the Haslar Collection. 



k-m. Adult. From the Collection of the Zoological Society. 



n. Adult : skeleton. From the Collection of the Zoological Society. 



0. Adult : skeleton. From Dr. A. Giinther's Collection. 



p. Half-grown : bad state : stuffed. 



q. Young : bad state. From the Haslar Collection. 



Skeleton. — The structui'e of the jaw-bones apjiears to be very 

 similar to that in C'hcetoclon. The limbs of the prseoperculum are 

 very indistinctly denticulated, and form together a somewhat obtuse 

 angle ; the interior ridge is slightly elevated, and has a distinct 

 muciferoiis channel posteriorly. The operculum is irregidarly qua- 

 drangular, 2| as liigh as wide. The prfEorbital is oblong, the re- 

 mainder of the infraorbital ring very narrow, and not joined to the 

 prseoperculum ; the tiu'binal tubiform, of moderate length. The 

 anterior frontal bones are rather small. Each principal frontal has 

 an obtuse longitudinal ridge, exteriorly with a small groove ; there 

 is another larger cavity between the two ridges. The crown of the 

 skull is elevated, -with, a high and broad occipital crest, which, how- 

 ever, does not reach to the spurious interneural spines. There are 

 two other crests on the side of the crown, on the inner of which is 

 suspended the suprascapula, the outer one being transformed into a 

 muciferou^ channel. The humeral is well developed aud sword- 

 shaped : the radius and the coracoid form a very deep cavity. The 

 pubic bones are separated from each other by a narrow interspace, 

 and each is composed of foui' lamellae. 



There are ten* abdominal and fourteen caudal vertebrce, the first 

 being much compressed in its longitudinal diameter, so as to be 

 easily gverlooked. The greater portion of the three anterior haemal 



* Cuvier states eight only. 



