54 REPORT OF NEW. JERSEY STATE MUSEUM. 
Mr. S. N. Rhoads says that he has seen packs of four to six 
Killers at Beach Haven and also at Atlantic City, “slowly trail- 
ing near the surface with their high dorsal fin standing straight 
out of the water.”” (Mammals of Penna. and N. J., p. 23.) — 
Orca gladiator Abbott, Cook’s Geol. of N. J., 1868, p. 760. 
Orcinus orca Rhoads, Mam. Penna. and N. J., 1903, p. 23. 
Order UNGULATA. 
Hoofed Mammals. 
To this order belong many of the larger mammals of the 
world, including almost all of the game animals, and the familiar 
domestic animals, the horse, cow, sheep, goat and hog. 
The Ungulates are characterized by horny hoofs on the toes, 
corresponding to the claws of the rodents and carnivorous ani- 
mals. ‘Their legs are usually long, and they are digitigrade, that 
is to say, they walk on the tips of the toes with the heel consider- 
ably elevated so that the main portion of the foot appears like a 
continuation of the leg, and popularly the hoofed toes alone are 
regarded as the foot. 
In the majority of ungulate animals, moreover, there is a re- 
duction in the number of toes, and the central metatarsal bones, 
or bones of the “instep,” are fused together, the outer ones being 
much reduced in size and forming the familiar “splints” of the 
horse’s foot. 
In the pigs, deer, cows, etc., there are four toes, although two 
are placed higher up than the others and are smaller in size, 
while in the horse there is only one toe—the familiar “hoof.” 
These two groups, the even and odd toed Ungulates, form the 
two main subdivisions of the order, and are known respectively 
as the Artiodactyli and Perissodactyli. The former are also often 
referred to as split-hoofed ungulates. Many of this group such 
as the deer, the cow, and their allies have a peculiar four-parted 
stomach, and they have the habit of casting up the hastily cropped 
grass into the mouth and chewing it more thoroughly at their 
