22 EMYDOSAURIAN AND TESTUDINIAN REPTILES 
absent. Head large, the jaws hooked; symphysis of the 
lower jaw very long. Two pair of prefrontal shields. Car- 
nivorous. (Caretta, a turtle). 
All tropical and subtropical seas. 
5. CARETTA CARETTA. 
Testudo caretta, Linneus, Syst. Nat., i. p. 351, 1766. 
Chelonia dussumieri, Duméril & Bibron, Erpét. Gen., ii. p. 557, 
pl. xxiv. fig. 1, 1835, 
Thalassochelys caretta, Boulenger, Catal. Chelon., p. 184, 1889. 
THE LOGGERHEAD TURTLE. 
Carapace strongly tricarmate in the young, arched or 
subtectiform in the adult ; serrated posteriorly in the young. 
Jaws very strong. Limbs of young usually with but two claws, 
of adult often with but one. Brown above, yellowish below. 
Length of carapace to 34 feet. 
The Loggerhead feeds principally on mollusks and crus- 
taceans. Outside of the ordinary limits of its distribution it 
has been captured on the south coast of England (Devonshire) , 
the west coast of France (Vendée), and the Dutch coast. 
An example was also washed ashore dead on the island of 
Vallay, North Uist, Scotland, in 1889. 
Superfamily #8. PLEURODIRA. 
Neck bending laterally. Pelvis ankylosed to the cara- 
pace and plastron. Digits with not more than three phalanges. 
A complete series of marginal bones connected with the ribs. 
(7Aevpd, side ; depy, neck.) 
Family D. CHELYIDZ. 
THE SIDE-NECKED TORTOISES. 
Shell covered with epidermal shields. Neck bending 
under the margin of the carapace, always exposed. Digits 
moderately elongate; claws four or five. (xéAvs, gen.; 
xéeAvos, a tortoise.) 
Fresh waters of Australia, New Guinea, and South Amer- 
ica. Genera nine. 
a. Intergular shield large, separated from the margin by the 
gulars; neck longer than the vertebral column; sym- 
physis of lower jaw narrow ; Se . i. Chelodina, 
aa. Intergular shield moderate, marginal ; neck shorter than 
the vertebral column; symphysis of lower jaw wide 
ii. Lmydura. 
