BALJENA, BLENNEUS* 157 



black. 2 Var, large spiracle. From 50 to 100 



feet long. North seas. 



) (fin-whale,) spiracles double on the mid- 

 dle of the forepart of the head ; a soft fin at the 



extremity of the back. 4 feet long. Temperate 



zone. 

 loops? (pike-head whale,) spiracles double on the 



snout ; a horny protuberance at the end of the 



back. 46 feet long. North seas. 

 gibbosa, (bunched whale,) back gibbose ; dorsal 



fin none. 1 Var. one bunch on the back. 2 Var. 



six bunches on the back. United States coast, 

 musculus, (round-lip whale,) spiracles double on 



the forehead ; under jaw very broad. 78 feet 



long. Norwegian seas. 

 rostrata, (beaked whale,) nose elongated to a peak; 



dorsal fin fat. 25 feet long, Norwegian seas. 

 See MS. P. 



4 5. BALISTES. Spec. 24. 



americana, (prickle -fish.) dorsal and ventral rays 

 very low, second dorsal fin and triangular anal 

 one larger. 

 See MS. P. 



86. BLATTA. Spec. 42. 



orientalist common cock-roach,) yellowish-brown, 

 without spots ; wing-cases abbreviated, with 

 an oblong groove. 



americana, (sugar cock-roach,) ferruginous; shield 

 of the thorax whitish behind. 

 See MS. P. 



42. BLENNEUS. Spec. 18. 



phyciS) (hake,) nostrils subcrested ; lower lip with 

 a cirrus ; back with two fins. 

 See MS. P. 



14 



