DELPHINIDAE oo 
Delphinus Tooth very numerous in both jaws, {8 to 89, 
occupying nearly the whole length of the rostrum, small, close-set, 
conical, pointed, slightly curved. Rostrum elongated, usually about 
double the length of the cranial portion of the skull. Pterygoids of 
normal form, meeting in the middlo line throughout their length, 
Palate with deep lateral grooves. Vertebras 73 to 75. Pectoral fin 
of moderate size, narrow, pointed, somewhat faleate. Second and 
third digits well developed ; the rest rudimental. 
The type of the genus is the Common Dolphin of the Mediter- 
ranean (2). delphis, Fig. 97), also found in’ the Atlantic, and of 
Fra, 87. The Common Dolphin (Delphinus delphis) From Reinhardt. 
which a closely allied if not identical form is met with in the 
Australian seas (2), forsteri) and in the North Pacitie (D. bairdi). 
Other species ave 1), janira, D. major, ete. 
Tursiops’°—Rostrum tapering moderately from base to apex : 
palate not grooved ; symphysis of mandible short; other cranial 
characters as in Delphinus. Teeth 31 to 33, stout (6 to 7 mm. in 
antero-posterior diameter). Vertebras: C7, D138, L17, C27; total 
64, Limbs as in Delphinus. Represented by the widely distributed 
T. tursio s Ty catalania Weing a second form. Fossil remains of this 
genus from the Italian PHocene have been recently deseribed. 
Prodelphinus%—Rostrm somewhat variable; mandibular sym- 
physis short (less than one-fifth the length of the ramus): other 
eramal characters as ine the preceding genus. Teeth §§ to §9, 
small, not exceeding 3 mm. in diameter, Vertebre 73 to 78. 
Limbs as in Delphinus. Four leading types of this genus are 
recognised (all of which have numerous synonyms) viz. 2. cbscurie, 
Po cuphrosne, Py davis, and 2. longirestris. 
Peron’s Dolphin (Delphinus lateorhamphus, Peron, or Leuco- 
rhamphus peroni, Lilljeborg) resembles some forms of Prodelphinars in 
its cranial characters; but having no dorsal fin, it has heen separated 
generically by some writers. It is not improbable that J/phinus 
borealis, Peale, from the North Pacitic. in which there is likewise no 
dorsal tin, may he an allied form. 
Sfevo.4—Rostrum long, narrow, and compressed, very distinet 
from the cranium; mandibular symphysis as long as, or longer than 
L Linn. Sve’. Vat. 12th ed. vol. ip. 10s (1700), 
2 Gervais, Hist, Vat. des Manmireres, vol. ii, p. 828 (1850). 
¥ Gervais, Osfcographic des Cetaces. po GOA (1S80%, 
+ Gray. Zoology of Hrebus and Perror, po 43 S46, 
