CETACEA. 119 



very slender, f ; palate rather convex ; lower jaw slender ; gonyx 

 keeled, short. 



Delphinus Alope, Gray, Zool. Erebus Terror, t. ined. 

 Hab. ? 



a. Skull. ? Mr. Warwick's Collection. 



Skull: length, entire, 16 J; of nose, 10 J; skull, 6; width at 

 orbit, 6 ; at notch, 3J ; at middle of beak, 2 inches. 



Doubtful species perhaps of this section. 



1. DELPHINUS? MICROBRACHIUM. 



Dauphin a petit pectoral, Voy. Pole*Sud, t. 21. f. 2; t. 23. f. 7, 8, 



not described. 

 Hab. South Sea? 



The skull so named in the Paris Museum has the palate flat, 

 rather convex behind ; triangle extended rather in front of the 

 teeth-line. Teeth f f ; nose narrowed in front, f the length and 

 2f times the length of the breadth at the notch ; lower jaw slender 

 in front ; nasal rather high and convex. May be a Steno. 



2. DELPHINUS DUBIUS. 



Nose depressed, like D. Delphis, but rather shorter ; the teeth 

 small and sharp, f y, thin, pointed. 



D. dubius, Cuv. R. A. i. 288 ; F. Cuv. Mam. Lith. t. ; Cetac. 



154 ; Ann. Mus. xix. 14. 

 Inhab. Coast of France. 



I found three skulls under this name in the Paris Museum. 



1. "D. dubius, Cuv. n. 10." Mus. Paris. 



Skull : length 15'3, of beak lO'O, width at notch 2'9, at middle 

 of beak 1*7; teeth Jf or ff ; palate flat, rather convex; lower 

 jaw flat, obliquely in front and keeled in front beneath. 



2. " D. dubius, Cuv. n. 2." Mus. Paris. 



Skull : length 16'6, of beak lO'O, of teeth-line 8'6, width at 

 notch 3'8, at middle of beak l*7i; teeth f or 3 ? 8 , small, hooked; 

 palate flat, rather convex; beak tapering in front, reflexed be- 

 fore the notch ; intermaxillaries rather convex ; triangle extend- 

 ing rather in front of the teeth-line, rugose in front. 



3. "D. dubius, Cuv. n. 7." Mus. Paris. 



Skull, from the Cape de Verd: length 16 0, of beak 9'4, of 

 teeth-line 7'6, width at notch 3'7i> at middle of beak 1*4; teeth 



