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. Prodelphiiius. Dolphins. 



^ to ^=,,0 to .00. 



Prodelphinus Gerv., Oste'og. des Ce'tace's, 1880, p. 604, pi. xxxvm. 



Clymene Gray, Proc. Zool. Soc., 1864, p. 237. 



Clymenia Gray, Syn. Whales & Dolphins, 1868, p. 6. 



Teeth smaller than those of Tursiops. Rostrum long, narrow; 

 no groove in palate; vertebrae, 73-78; symphysis of mandible short; 

 beak elongate; dorsal and pectoral fins falcate. 



FIG. XXI. PRODELPHINUS PLAGIODON. SHARP-TOOTHED DOLPHIN. 



KEY TO THE SPECIES. 



A. Teeth conical, small, numerous; rostral por- 

 tion of intermaxillae convex, 

 a. Purplish gray above spotted with white; 

 breadth of rostrum at base, 109; at middle, 

 58; between orbits, 186 P. plagiodon 



PA r.K 



