5. PRODELPIIINUS P. MALAYANUS AND ATTENUATUS. 165 



Measurements of the sJculL— Total length, 45.9""; length of rostriuu, 

 27.4''"'; breadth of rostrum at its base, 10.9""; at its middle, 5.8""; breadth, 

 between orbits, 18.6™; length of temporal fossa, 8.4"". 



/Za&(7of.— Atlantic coast of United States; Cape Hatteras; Gulf of 

 Mexico ( U. S. National Museum). 



PRODELPHINUS MALAYANUS (Lessou). 

 (Plato 10, figs. 1 and 2.) 



Blowhole placed a little behind the^lineof the eyes, which are very 

 small. Head large and rounded, very convex on the forehead, which 

 slopes rapidly. A deep furrow at the base of the beak, which is nar- 

 row and elongated ; lower jaw the longer. (Lesson.)* 



Color, uniform ashy. 



^/,w(7._(From Celebes. Identified with this species by Schlegel.) 

 Teeth ijy. Skull like that of the typo of r.attemiatus (Gray), but abso- 

 lutely larger, with relativ^ely longer beak and shorter tooth-row. 



Measurements of the exterior. — (From Lesson.) Total length, 192.2""; 

 height of dorsal flu, 21.6""; length of pectoral fin, 35.1"". 



Measurements of the skull. — (Mus. Pays-Bas, No. 5. Identified with 

 this species by Schlegel.) Total length, 42.5"'; length of rostrum, 

 26.7""; breadth of rostrum at base, 9.2""; at its middle, 4.4""; breadth 

 of intermaxijhe at same point, 2.1""; length of temporal fossa, 6.9""; 

 depth of temporal fossa, 5.2"". 



Hahitat. — East Indies. 



PRODELPIIINUS ATTENUATUS (Gray). 

 (Plato 17, figs. 1 and 2.) 



Color dark on the back, ashy-gray below. (Liitken). 



Teeth, ^:J to H. Skull (D. attenuatus, Gray, type) closely resembles 

 that of P. malayanus. Vertebrae: C. 7; D. 15; L. 21; Ca. 36-38= 

 79-81. (Liitken.) 



Measurements of the exterior^ 9 . (Liitken.) Total length, 69.1 inches 

 (175.5""); length from extremity of snout to dorsal, 32.2 inches (81.9'"'); 

 length from extremity of snout to pectoral, 15.9 inches (40.3''"') ; length 

 of snout, 4.6 inches (11.7"'"). 



Measurements of the skull. — (3476. British Museum. Type of P. 

 atteniiatm.) Total length, 38.3''"' ; length of rostrum, 22.9'''" ; breadth of 

 rostrum at base, 8.7'"'; at its middle, 3.8"" ; breadth between orbits, 

 14.7'="' ; length of mandible, 32.9"". 



Habitat. — Atlantic Ocean, near St. Paul Island {Liitken). Cape of 

 Good Hope {Gray). 



*Ono of the cliaracfjers given by Lesson is .as follows: "A strong carina, as in cer- 

 tain scombroid fisbes, occupied tlie lateral and posterior parts of the body." The 

 meauini>; of this is not clear. 



