CETACEA. 769 
‘condenses into a cloud, which is sometimes increased by 
an accidental puff of, spray. 
The kidneys are lobulated. The testes are abdominal. 
There are no seminal vesicles. The uterus is bicornuate. 
The placenta is non-deciduate and diffuse. The two 
mamme lie in depressions beside the genital aperture, and 
Fic. 414.—Pelvis and hind-limb 
of Greenland whale (Balena). 
—After Struthers, 
P., Pelvis; #., femur; 7., tibia. 
the milk is squeezed from special reservoirs into the mouth 
of the young. Usually a single young one is born at a time, 
and there are never more than two. 
All are carnivorous; but, while many feed on small 
pelagic animals, other swallow cuttles and fish, and Orca 
attacks other Cetaceans and: seals. Most are gregarious, 
and live in schools or herds. 
[TaBLz. 
49 
