30 LISSODELPHIS. PRODELPHINUS. 



44. borealis \Dclphinapterus), Peale U. S. Expl. Exp., Mamm., 1S48, 

 p. 35, pi. viii, fig. 2. 



Crc-oxr. Distr. North Pacific Ocean, San Diego, coast of Cali- 

 fornia to Bering Sea. 



Genl. Char. Slender; lower jaw longer than upper, decurved at 

 extremity; flukes small, symphysis of mandible not keeled. 



Geogr. Distr. North Pacific Ocean, coast of California, Japan. 



Color. Lozenge-shaped area on a line between the pectorals 

 and flukes, end of lower jaw and lower sides of flukes white or clouded 

 with white, remaining parts black. 



Measurements. Total length, 2464; end of snout to pectoral, 635; 

 length of pectoral. 305; breadth of flukes, 406. Skull: total length, 

 437; length of rostrum, 240; breadth of rostrum at base, no; at mid- 

 dle. 56; interorbital breadth, 176; length of temporal fossa, 71. 



35. Prodelphimis. 



^~- tn •°~"° = 120 to 200. 

 30—30 •■" fo— 50 



Prodelphinus. Gerv. , Ostdog., des C^tac^s. 1880, p. 604. Type P. 

 dubius, Cuv. 

 C/ymene, Gray, Proc. Zool. Soc, 1864. p. 237 (nee Oken et Savi, 



1815-17)- 

 Chrnenia, Gray, Syn. Whales and Dolphins, 186S, p. 6 (nt 



Munst., 1839). 

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

 no groove in palate. Vertebrs, 73-78. Symphysis of mandible, 

 short. Beak elongated. Dorsal and pectoral fins falcate. 



45. euphrosine. {Delpkinns), Gray, Zool. Erebus and Terror, 1846. 

 p. 40, pi. 22. 



Styx, Gray, Zool. Erebus and Terror, 1846, p. 39, pi. 2. 



tethyos, Gerv. Bull. Soc. Agr. Herault, 1853, xl, p. 150. pi. i. 



marginatus, (Duvern). Pucher. Rev. Zool., 1854, p. 547. 



doreides. Gray, Cat. Cet., 1866, p. 400. 



euphrosinoides. Gray, Synops. Whales and Dolphins, 1868, p. 6. 



nova-zelandiiT. Hector, (nee Gray), Trans. N. Z. Inst., v, p. 159. 



Geogr. Distr. Atlantic Ocean, South Greenland, Mediterranean 

 Sea. 



Genl. Char. Body stout, beak long; dorsal fin high, falcate; pec- 

 torals small. 



Color. Above black; sides blackish, beneath white; orbital ring 

 black; black band from eye to vent and one going downward and 

 backward above base of the pectorals; this black band is divided from 

 the dark color above bv a white band which is broadest in the middle 



