THE MAMMALS OF NEW JERSEY. 45 



Balaenoptera musculus (Linnaeus.) 



Great Blue Whale, Sulphurbottom. 



Plate 4, Fig. 2. 



Length, 60 to 70 feet. Head broader and more obtuse than the 

 other species of the genus, dorsal fin short, only one per cent, of 

 total length. Color, mottled gray throughout. 



This whale, the largest of living animals, has occurred at 

 least once on the New Jersey coast, a specimen having been 

 stranded at Ocean City on October ist, 1891, the skeleton of 

 which is now in the Museum of the Academy of Natural Sci- 

 ences of Philadelphia. It measured 6^ feet in length, and is 

 described by Prof. E. D. Cope in the Proceedings of the Acad- 

 emy, 1 89 1, p. 474. 



BalcEnoptera musculus Cope, Proc. Acad. Nat. Sci. Phila., 

 1891, p. 474. — Rhoads, Mam. Pa. and N. J., 1903, p. 13. 



Family PHYSETERID-ffi:. 



Sperm Whales. 



These whales are distinguished from the Whalebone Whales 

 by the presence of regular teeth in the lower jaw (but none in 

 the upper), by the absence of whalebone, and by the high vertical 

 forehead. There are two genera : 



a. Teeth large and heavy, 22 to 24 on each side ; size of animal very large. 



PHYSETER 

 aa. Teeth slender, curved, 4 to 14 on each side ; size of animal small. kogia 



Genus PhysETER Linnaeus. 



Sperm Whales. 



Physeter macrocephalus Linnaeus. 



Sperm Whale; Cachalot. 



Plate 6. 



Length 60 to 80 feet. Head oblong, level with the back above, 

 square and truncate in front, forming nearly one-third of the 



