TURSIOPS. LISSODELPHIS. 29 



42. tursiu [/)t-//>/ii»us). Fabric. Faun. Groenl., 1780, p. 49. 



triincatiis, Montagn, Mem. Wern. Soc, 1821, iii, p. 73. 



compressicaiiJa, Less. Cut., 1828, p. igg. 



communis, Fitzin. (nee Cuv). Carr. Dalm., 184b, p. 75. 



metis. Gray, Zool. Erebus and Terror, 1846, p. 38, pi. 17. 



cymodice. Gray, Zool. Erebus and Terror, 1846, p. 38, pi. 17. 



eurynome. Gray, Zool. Erebus and Terror, 1846, pi. 38, pi. 18. 



Type locality. Coast of Greenland. 



Geogr. Dislr. Atlantic Ocean, Mediterranean Seas — wiiiely dis- 

 tributed. .Atlantic coast of .\tlantic states, Maine to Florida; Gulf of 

 Mexico. 



Genl. Char. Practicall)' those of the genus. Frontal bone has 

 no backward extension and the parietal is broad inferiorly. 



Co/or. Upper parts of fins plumbeous gray tinged with purple, 

 grading on sides into the pure white of the underparts. 



Measurements. Total length skull, 432; length of beak, 232; 

 greatest breadth of beak, 108: length of tooth line, 195; width 

 between interorbitals, igi; length of mandible, 365. Total length 

 of animal, 2907; of mouth, 319; height of dorsal fin, 229; breadth of 

 flukes, 612. 



43. gillii. (Tursio/>s), Dall, Proc. Calif. Acad. Scien., 1873, v, p. 13. 



Geogr. Distr. North Pacific Ocean and along shores of South- 

 ern and Lower California. 



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 all over, lightened a little below." 



.\feasurements. Length of beak, 298: breadth at base of maxil- 

 lary vertebr.T, 141; at the middle, 88; length of tooth line, 254; length 

 of mandible, 427. 



2\. Lissoclelphis. 



idzi! to 44:^4 ^ 1-6 to 182. 

 44—44 47—47 



Lissodelphis. Glog. Hand-u Hilfsbuch d. Xaturgesch., i84i,p, 169. 



Type /). peronii Lacepede. 



Tursio, Wagl. Nouv. Syst. Amph. 1830, p. 34 (nee Fleming). 



Delphinapterus, Gray, Zool. Erebus and Terror, 1846, p. 35. 



Dorsal fin absent. Rostrum long, tapering, flat; pterygoids sep- 

 arate; margins parallel; mandibular symphysis short; teeth small, 

 acute. Beak short, narrow; pectoral fins falcate. 



