APPENDIX. 495 



being nearly on aline wiih the belly. The height of the tail 

 between the vertical fins is equal to half the greatest height 

 of the body. The dorsal and ventral lines are both acute, 

 especially the former, and the medial line of the nape continues 

 acute to the orbits. 



The length of the head, measured from the upper jaw, is 

 contained four times and a half in the total lenfrth of the fish. 

 The large round eye, situated near the upper profile, fills more 

 than a quarter of this length. The orbit is surrounded by a 

 ring of rauciferous canals, with open orifices, which are the 

 only exterior vestiges of the suborbitar chain. The small 

 mouth descends obliquely and scarcely reaches back to the 

 orbit. The intermaxillaries are moderately protractile, but the 

 lower jaw, when depressed, projects still further forward. The 

 maxillary widens towards its lower end, which curves a little 

 forwards. Three pores exist on each limb of the lower jaw. 



The teeth of the upper jaw present a fine, but rather uneven 

 and broad cardiform surface at the symphysis, which narrows 

 to a single row towards the corner of the mouth, where they 

 are a little longer and more subulate. Four canine teeth 

 stand across the end of the jaw anterior to the dental plate, the 

 intermediate ones being shorter than the outer ones. The den- 

 tition of the under jaw differs in the dental band being nar- 

 rower, and in there being a conspicuous canine in the middle 

 of each limb of the jaw. There are also six canines standing 

 across the extreme tips of the jaw, opposed to the upper ones. 

 Most of the teeth are slightly curved backwards. The chevron 

 of the vomer projects from the roof of the mouth, and its sur- 

 face is armed by minute teeth in about three or four densely 

 crowded rows. The palatine teeth are still more minute, and 

 the band is four or five deep. The teeth, when examined with 

 a lens, appear to be very acute and in nowise sphserical. The 

 pharyngeal teeth are subulate and acute, and of unequal 

 heights. There seems to be only one inferior pharyngeal bone 

 below ; but without dissection this could not be clearly 

 made out. The outer branchial rakers are long. 

 2 K 2 



