164 BULLETIN 3(5, UNITED STATES NATIONAL MUSEUM. 



tiis 5.)— 'i'otal leugtb, 47.5""; length of beak, 29.2""; breadth of same 

 at the middle, C.3"". 



Habitat. — Atlantic Oceau; South Greenland (Broicn)', Shetland and 

 Orkney Islands {Bell); Dieppe; mouth of OrbEiver; ? Mediterranean 

 {Mus. (VHist. nat.)', Jamaica [Royal Victoria Rosj)., Ketleij); between 

 St. Paul and Ascension Islands {Liitl-en) ; South Africa {Flower). 



PRODELPHINUS (?) LATERALIS (Peale). 

 (Plate 15, lis- 3.) 



Form thick; snout small; body much compressed behind the dorsal 

 till. Color light purplish-gray; beneath white. A dark lateral line, 

 edged with spots, separates the colors of the upper and under iiarts of 

 the body; a separate line, paler in color, branches from the lateral line 

 opposite the pectoral tins and passes downwards and backward; another 

 connects the eyes and pectoral fins; snout black; fins black. (Peale.) 



Total length, 7 feet G inches. 



Teeth t^,--%- (Cranial characters unknown.) 



nahitat.—V AciHc Ocean, lat., 13° 53' K; long., IGP 22' W. 



PRODELPHINUS (?) PLAGIODON (Cope). 

 (Plate 18, figs. 1 and "2.) 



General form like that of DelpMnus ilelphis. Dorsal fin high and 

 strongly recurved; a line joining the center of its base and its extrem- 

 ity makes an angle of 45 degrees with the longitudinal axis of the body ; 

 anterior margin straight in the lower three- fourth, then rather strongly 

 curved backward; the concavity of the posterior margin forms an arc 

 of a circle. Pectoral fins broad at the base. Beak stout; the depth 

 of the jaws taken together, at the middle, about one-third greater than 

 their breadth; length of beak about one-seventeenth the total length. 



Back, head, margin of lower jaw, fins, and tail dark jturplish gray 

 which becomes lighter on the sides and shades into the white of the 

 lower half of the same and of the belly. Dark colored upper half 

 of the body and the fins spotted with white or light gray; light-col- 

 ored lower half of the body with prominent oblong spots of dark gray. 

 Largest spots about IS™'" long. 



Teeth ^J. Skull very similar to that of P. doris, but larger (total 

 length 45.9""). (See p. G7.) Vertebrte: C. 7; D. U; L. 19; Ca. 28-29= 

 G8-G9. 



Measurements of the exterior. —{\J. S. National Museum, No. 15030, $.) 

 Total length, 84.9 inches (215.7""); length of mouth, 11 inches (28.0'"') ; 

 extremity of snout to dorsal fin, 13.3 inches (33.7""); length of pectoral 

 till, 11.9 inches (30.4""); vertical height of dorsal fin, 9.5 inches (24.1""); 

 breadth of flukes, 20.7 inches (52.7""), 



