10 THE ZOOLOGIST. 
forehead is rounded, and the thick projecting upper lip is separated 
by a hollow from the convexity of the head. The teeth, which are 
confined to the lower jaw, vary in number from three to seven on 
each side, and are all placed in front. As regards the ground 
colour, Risso’s Grampus is very variable, being either black above 
and white below, or grey, passing into black above and white 
beneath; but it may always be distinguished by the curious way 
in which this ground colour is warked and covered with irregular 
lines and narrow streaks and spots of white. It is a rare animal, 
and nothing is yet known of its distribution and habits. Three 
specimens only have been obtained on the south coast of England. 
Genus Globiocephalus, Lesson. 
With the last-named genus the present agrees in having a 
rounded head, no beak, and long narrow flippers; but differs in 
the shape of the dorsal fin, which is long and low instead of high, 
and in the teeth, which are large and numerous in both jaws. 
Globiocephalus melas (Trail). Pilot Whale, Ca’ing, or Driving. 
Whale.—Averages from 16 to 20 feet, and has 56 vertebre and 
12 pairs of ribs. The jaws are short, the upper one being some- 
what longer than the under one. The teeth, of which there are 
about 24 on each side in both jaws, are large and conical. The 
colour is deep black above and white below, terminating in a white 
heart-shaped spot on the throat. It is a native of the northern 
seas, but goes at least as far south as the Mediterranean, and 
occasionally visits our shores in some numbers. 
Genus Phocena, Cuvier. 
This genus, which has most of the characters possessed by the 
two last-named genera, differs chiefly in regard to its teeth, which 
are present in both jaws, and are compressed, spatulate and 
truncated. 
Phocena communis, Cuvier. Porpoise.*—Average length 4 or 
5 feet, with 65 vertebra and 13 pairs of ribs. The lower jaw is 
slightly longer than the upper one. The teeth vary in number 
from 20 to 26 on each side in both jaws, and, as above stated, are 
compressed, spatulate and truncated. In colour it is black, or 
dusky, above, gradually shaded into white beneath. It inhabits 
the North Atlantic, but is seldom found far from land, and is the 
* “ Porpoise” from Porc-poisson. Often called “ Hog-fish” by English sailors. 
