86 FISHES; 



38. Chimera. Head pointed: spiracle solitary, .4* 

 parted, under the neck : mouth placed beneath, with 

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

 above 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 t 

 body elongated, mailed above by bony tubercles. 



40. Lophitjs. Hea d depressed : teeth sharp, numerous: 

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

 ral simple aperture : pectoral-fins 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 infront: 

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

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

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

 instrument of adhesion. 



42. Cephalus. Jaws bony i aperture of the gills linear 

 or oval : body terminating abruptly, so as to resemble 

 the head of a fish cut off. 



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

 of the gills linear : body rough with prickles under- 

 neath : ventral-fins none. 



44. Syngnathus. Snout long, cylindrical, witn the 

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

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

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



45. Centriscus. Snout long, without lid : moutfr with- 

 out teeth : aperture of the gills repand : body 

 compressed, carinate along the belly : ventral-fins 

 united. 



