20 DELPHINAPTERUS. PHOCAENA, 



conotta. Cope, Proc. Acad. Nat. Scien. Phil., 1865, p. 278. 



declivis. Cope, Proc. Acad. Nat. Scien. Phil., 1S65. p. 278. 



Type loiality. Coast of Siberia. 



Geogr. Diitr. Arctic and sub-Arctic seas. South to Cape Cod, 

 Mass. 



Genl. Char. Pterygoids appro,ximating towards their ends, but 

 not meeting: intermaxills broad somewhat convex, sometimes extend- 

 ing to posterior wall of the superior nares. Other characters same as 

 those of the genus. 



Color. All white. 



Measurements. Total length 3483; tip of snout to pectoral, 736; 

 length of pectoral, 410; breadth of same, 255. Skull: total length, 

 53.3: length of rostrum, 26.4: breadth at base, 18.3; at middle, 9.9; 

 interorbital breadth, 27.2: length of temporal fossae, 15.2. 



16. Phocaena. 



25—25 

 Phocsena. Cuv. Regn. Anim., 1817, i, p. 279. Type Z>. ///(;<(r//(j, Linn. 

 Rostrum short, broad, tapering towards apex, premaxillas raised 

 into tubercles before the nares: nasals flat: mandibular symphysis 

 short; teeth small, crowns spade-shape, occupying nearly the entire 

 length of rostrum; the neck of each tooth constricted: pterygoids sep- 

 arated on median line: head not beaked: dorsal fin small, blunt spines 

 often seen on the anterior margin: pectoral fins ovate: first to sixth 

 cervical vertebrae coalesced. 



28. communis. {Phoaena), Cuv. Regn. .\nim., 1817, p. 279. 



phocana, {Delphinits), Linn. Syst. Nat., 1758, p. 77. 



vomerina, Gill. Proc. Acad. Nat. Scien. Phil., 1865, p. 178. 



brachycium. Cope, Proc. Acad. Nat. Scienc. Phil., 1865, p. 279. 



? lineata, Cope, Proc. Acad. Nat. Scienc. Phil., 1876, pp. 134, 135. 



Type locality. Coast of Europe. 



Geogr. Distr. North Atlantic to North Pacific Oceans. United 

 States coasts. Maine to New Jersej-. and Puget Sound to Glacier 

 Bay, Alaska. 



Genl. Char. Slender: dorsal fin anterior to middle of the length, 

 triangular, posterior margin concave, anterior about straight, with 

 sometimes a row of tubercles. Jaws of equal length. 



Color. Upper parts slate or blackish, grading on sides into the 

 white of lower parts. Sides somewhat tinged with yellow or pink. 

 Narrow dark line from corner of mouth to anterior base of pectoral, 

 and a broad dark band often extends from lower jaw half way to the 

 pectoral. 



