86 FISHES. 



38. CHIM^ERA. Head pointed: spiracle solitary, 4- 

 parted, under the neck : mouth placed beneath, with 

 the upper-lip 5-cieit : cutting-teeth 2 in front, both 

 ahove and below. 



39. ACIPENSER. Snout bearded underneath : mouth 



placed beneath the head, oval, retractile, without 

 teeth : aperture of the gills on the sides of the head : 

 body elongated, mailed above by bony tubercles. 



40. LOPHIUS. Head depressed : teeth sharp, numerous : 

 tongue broad, armed with teeth.: gills 3, with a late- 

 ral simple aperture : pectoral^jins broad, more or less 

 resembling feet ; dorsal and anal opposite, and near 

 the tail : vent in the middle of the body. 



41. CYCLOPTERUS. Head obtuse : mouth placed in front: 

 teeth in the jaws : tongue short, thick ; gill-membrane 

 4- rayed, the cover of one piece : body thick, without 

 scales : ventral-fins united into, a circle, forming an 

 instrument of adhesion, 



42. CEPHALUS, Jmesbony: aperture of the gills linear 

 or oval : body terminating abruptly, so as to resemble 

 the head of a fish cut oft*. 



43. TETRODON, Jaws bony, divided at the tip : aperture 

 of the gills linear : body rough with prickles under- 

 neath ; ventral-Jins none. 



44. SYNGNATHUS, Snout long, cylindrical, with the 

 mouth at the end, furnished with a lid : gitt-covers 

 large, striate, closed : spiracle tubular, on the nape : 

 body elongated, jointed, mailed : ventral-fins none. 



45. CENTRISCUS. Snout long, without lid : mouth with- 

 out teeth : aperture of the gills repand : body 

 compressed, carinate along the belly : ventral-fins 

 united. 



