48 REPORT OF NEW JERSEY STATE MUSEUM. 
vertebre of the neck are separate, while in Hyperoodon they are 
all fused. Color, light stone gray, darker on the belly. Dr. F. 
W. True records the stranding of a specimen of this whale 
at Barnegat City, October 3d, 1883, an adult female measuring 
19 feet 4 inches. This is the only record for our Atlantic coast 
(see Science, 1883, p.540)): 
Ziphuus cavirostris ‘True, Science, 1883, p. 540. Rhoads, 
Mam. Pa. and N. J., 1903, p. 16. 
Genus MEsopLopon Gervais. 
Mesoplodon bidens (Sowerby). 
Cowfish, Sowerby’s Whale. 
Length, 12-16 feet. Similar to the last, but male with a tooth 
on each side of the lower jaw at about the middle, female tooth- 
less, skin very smooth, black all over with occasional lighter 
blotches. A male specimen, twelve and a half feet long, was 
stranded at Atlantic City, March 18th, 1889, and its skeleton is 
preserved in the U. S. National Museum. 
Micropteron bidens Turner, Proc. Roy. Phys. Soc. Edin., X 
(1889), p. 13. 
Mesoplodon bidens Rhoads, Mam. Pa. and N. J., 1903, p. 17. 
Family DELPHINIDA. 
DOLPHINS AND PORPOISES. 
This family comprises all the smaller cetaceans. All of our 
species have a dorsal fin, and all except the Grampus have 
numerous sharp teeth in both jaws. 
The popular name dolphin strictly applies to those species with 
a projecting snout, while the porpoises have a rounded head 
without a snout. As is frequently the case, however, the names 
have become hopelessly misapplied, and the most plentiful 
dolphin on our coast is usually known as the porpoise. 
The several genera that occur on the New Jersey coast may be 
distinguished as follows: 
