172 BULLETIN 36, UNITED STATES NATIONAL MUSEUM. 



bly mottled with black, gray, and brown. A similar light area in the 

 median line of the back behind the blow-hole and another on the tail, 

 near the insertion of the flukes ; under side of fluke grayish. 



The light areas of the sides are sometimes indistinct, or absent. 



Teeth f^; Vertebn^: C. 7, D. 15(-1G), L. 23(-24), Ca. 43(-45)=88 

 (-92\ Skull similar to that of L. acutus. Rostrum short, broad, and 

 pointed; its breadth at the base two-thirds its length. Intermaxilliii 

 broad and flat, their outer margin convex. Temporal fossfe moderate, 

 elliptical, not strongly directed upward. 



Mcasnrcmcnts of the exterior.— { S, young. From Clark.) Total length, 

 G5i inches (IGfi.i"'); distance from extremity of snout to base of 

 dorsal fin, 30 inches (70.2"^); vertical height of dorsal fin, G inches 

 (15.2""); length of pectoral fin, 12 inches (30.i>'") ; breadth of flukes, 

 15 inches (38.1""). 



Measurements of the slmll.—^S. N. Mus. Sci. and Art, Edinburgh.) 

 Total length, 4G'"'; length of rostrum, 22.9'"'; breadth of same at base, 

 15.2""; at its middle, 8.7'"'; breailth between orbits, 23.5^"'; length of tem- 

 poral fossa, 7.9 '". 



Habitat. — Korth Atlantic Ocean; Baltic Sea, Kiel {Claudius) ; IN'orth 

 Sea; Irish Ciiannel ; FariJe Islands; Greenland (Beinhardt) ; Davis 

 Strait {Eschricht). 



LAGENORHYNCHUS OBLIQUIDENS Gill. 

 (Plato 27, figs. 1 and 2.) 



In form, and also probably in coloration, nearly identical with L. acu- 

 tus. "The animal is rather thick in proportion to its length; black 

 above, with a strongly falcate dorsal. Below, white, to the edge of the 

 patch passing from the lower li]) below the pectorals and terminating a 

 short distance behind the vent. A broad gray smouch on each side 

 above the line of the black color, and interrupted about the middle of 

 the animal on each side; the edges of the gray are ill-defined. The 

 posterior edges of the pectorals and dorsal are also grayish." (Dall.) 



"Greenish black on the upper surface, lightened on the sides with 

 broad longitudinal stripes of white, gray, and dull black, which in most 

 examples run into each other, but below it is of a pearly or snowy 

 white. The posterior edge of the dorsal fin is tipped with dull white or 

 gray, and sometimes the flukes are marked in the same manner." 

 (Scammon.) 



Teeth ;[. Vertebra? : C. 7, D. 13, L. 24, Ca. 30=74. 



Skull similar in general appearance to that of i^. acut^is, but somewhat 

 less broad in i)roportion to its length (the width between the orbits is 

 less than the length of the rostrum.) Premaxilhr more or less rounded, 

 their outer margins not strongly sinuate. Temporal fossa) large and 

 rounded. Pterygoid bones not in contact in the median line, widely 



