4. lUEsio. 257 



(u Skull. The specimen figured in the ' Voyage of the Erebus and 

 Terror.' 



in. lin. 



Skull : Length, entire 21 



Length of nose 11 9 



Length of lower jaw 17 



Breadth at orbit 9 6 



Breadth at notch 5 



Breadth at middle of beak 3 



This skull is like that of B. Euphrosyne, but differs in the nose 

 being rather shorter compared with the length of the head, more 

 tapering, and the teeth rather larger. It differs from Del^hinus 

 Twsio's in the nose being much shorter and more conical and acute. 



4. Tursio Cymodoce. The Gymodoce. 

 Skull roundish ; rostrum broad, rounded above, broad at the base, 

 gradually tapering in front and convex on the sides, one-twelfth 

 longer than the head — or more than half the entire length, and more 

 than twice as long as the width at the notch ; the triangular impres- 

 sion in front of the blowers elongate, extended beyond the line of the 

 hinder teeth. Teeth l^, moderate, conical, slightly incurved, acute, 

 more than three in one inch ; lower jaw regularly converging, 

 straight on the sides, the front obliquely truncated, and the gonyx 

 slightly produced. 



Delphinus Cymodoce, Grat/, Cat. Osteol. B. M. 35 ; Zool. Erebus 8r 

 Terror, 38. t. 19; Cat. Cetac. B. M. 1850, 113. 



Inhab. ? 



a. SkuU — • — ? The specimen figured in the ' Voyage of the Erebus 



and Terror,' 1. 19. . ,. 



' m. Im. 



SkuU : Length, entire 18 6 



Length of head 8 6 



Length of nose 10 



Length of teeth-line 7 9 



Length of lower jaw 15 



Width of temple 8 6 



Width of notch 4 9 



Width at middle of nose 2 8 



Width of intermaxillary 1 7 



This skull is very like B. Metis, but much smaller, and the beak 

 more conical. 



c. Beak of skull rather thick, and rather swollen on the sides. Teeth |g jg . 



5. Tursio? Gtdanensis. The Guiana BolpMn. 



Teethff.fforf^.l^; 



Delphinus Guianensis, Van Benedenj M4m. Acad. Roy. Brux. 1862, 

 xvi. t. 



Inhab. British Guiana {Van Beneden). From Mus. Stutgardt. 



