82 CLASS IV. OKDEIl II. 



ened, directed upwards, retractile towards the 

 head by means of a membrane ; mouth without 

 teeth ? branchiae three pair beneath the throat ; 

 fins, pectoral small, dorsal the length of the back* 

 caudal short with spiny rays ; body very long, 

 compressed. 



TRICHIURUS, (needle-tail,) head stretched for- 

 ward, with lateral gill-covers ; teeth ensiform and 

 semisagittate at the tips ; gill-membrane 7-rayed : 

 body ensiforin, compressed, with subulate, fluless 

 tail. 



ANARCHTCHAS, (wolf-fish,) head rather obtuse ; 

 fore-teeth, both above and below, coniral, diverg- 

 ent, strong, 6 or more in number ; grinders in the 

 lower jaw and palate rounded ; gill -membrane 6- 

 rayed ; body roundish ; tail-fin distinct. 



XIPHIAS, (sword-fish,) head with the upper 

 jaw terminating in a sword-form snout ; mouth, 

 without teeth ; gill- membrane 8-rayed ; body 

 roundish, without scales. 



STROMATEUS, (stromat,) head compressed : 

 teeth both in jaws and palate ; body rhombic- 

 ovate, compressed, lubricous. 



STERNOPTRIX, (amber-fish,) head obtuse ; mouth 

 abrupt ; teeth very minute ; gill-membrane none ; 

 body compressed, without visible scales ; breast 

 cariuate, folded both ways ; abdomen pellucid. 



ORDER 2. JUGULARES. 



Gill-membranes with bony rays ; ventral Jim 

 before the pectoral. 



CALLIONYMUS, (dragonet,) eyes vertical, ap- 

 proximated ; gill covers shut, with a small aper- 

 ture on each side the neck ; gill-membrane 6- ray* 

 ed ; body naked j ventral fins very remote. 



