TURSIOPS. PRODELPHINUS. 57 
Geogr. Distr. Shores of southern and Lower California to northern 
part of Pacific Ocean. 
Genl. Char. Optic canal not reaching the level of the rounded 
antero-internal border of the deeply concave frontal, and the lower 
part of the parietal is a narrow band between the anterior margin 
of the squamosal and the posterior margin of a backward extension 
of the frontal. 
Color. Black, the under parts a little lighter than the upper. 
Measurements. Length of beak, 29.8; breadth at base of maxil- 
lary notches, 14.1; at the middle, 8.8; length of tooth row, 25.4; 
length of mandible, 42.7. 
26. Prodelphinus. Dolphins. 
3o— 30 So—So 
—— to —— = 120 to 200. 
30—30 So—So 
Prodelphinus Gerv., Ostéog. des Cétacés, 1880, p. 604, pl. xxxvIIl. 
Clymene Gray, Proc. Zodl. Soc., 1864, p. 237. 
Clymenta Gray, Syn. Whales & Dolphins, 1868, p. 6. 
Teeth smaller than those of Tursiops. Rostrum long, narrow; 
no groove in palate; vertebre, 73-78; symphysis of mandible short; 
beak elongate; dorsal and pectoral fins falcate. 
Fic. XXI. PRODELPHINUS PLAGIODON. SHARP-TOOTHED DOLPHIN. 
KEY TOE SPECIES: 
A. Teeth conical, small, numerous; rostral por- 
tion of intermaxille convex. PAGE 
a. Purplish gray above spotted with white; 
breadth of rostrum at base, 109; at middle, 
Ron Det Wweemembts: TBO 2%. 124545. ow ks 6 P. plagiodon 58 
