222 THE STRUCTURE OF MAN 



[PHYLUM. A term applied to any great race or assemblage of genetically 



related forms of life, which conform to the same fundamental type.] 

 [PHYSIOLOGY. The study of the functions of living matter, i.e. of the living 



in action.] 

 PINNIPEDIA. Marine Carnivora, having feet transformed into paddles. The 



Seals, Sea-lions, and Walruses. 

 [PLACENTALIA. The highest sub-class of Mammals. Those Mammals which 



develop an allantoic placenta.] 

 PRIMATES. The highest order of Placenta! Mammals, including the Lemur- 



oidea, Monkeys, Apes, and Man. 

 PROSIMII. (Cf. Lemuroidea.) 



REVERSION. (Cf. Atavism.) 



RODEXTIA. An order of gnawing Mammals (Rabbits, Rats, Porcupines, 

 Squirrels, and their allies). 



SADRIANS. Lizards. 



SELACHIANS. Sharks and Dog-fishes. (Cf. Elasmobranchii.) 



SIRENIA. An order of Aquatic Mammals. (Cf. Manatee.) 



SLOW WORMS. A group of Limbless Lizards. 



STEGOCEPHALA. Fossil Amphibians, most abundantly represented in the 



Carboniferous, Permian, and Triassic strata. 



STENOPS. The " Slender Lori " of Ceylon, one of the Lemuroidea. 

 Sus SCKOFA. The Domestic Pig. 



TARSIUS. [The "Tarsier" of Borneo, Sumatra, and the Celebes.] One of 



the Lemuroidea. 

 TELEOSTEI. The Bony Fishes. 



TETRODONTA. Aberrant Bony Fishes, belonging to the family Gymnodontes. 

 TOOTHED WHALES. A group of the Cetacea, including the Cachelots or 



Sperm Whales, Dolphins, and Porpoises. (Cf. Cetacea.) 



UNGULATA. The Hoofed Mammals. 



URODELA. The Tailed Amphibians. Newts, Salamanders, and their allies. 



URSUS. The Bear. 



ZIPHIUS. [A long-snouted Toothed Whale met with in most of the great 

 seas.] 



