5. LAQENOEHYNCITTTS. 273 



a. Skeleton. Yarmouth. Skull figured in ' Voy. of H.M.S. Ereb. and 



Terr.' tab. 11, p. 35. Mr. BrighfcweU's specimen. 

 h. Stuffed skin of a. Yarmouth. 

 c. Skeleton. England ? Mr. Stevens's Collection. 



Measurements of specimen from Yarmouth : — 



in. lin. 



Animal ; Length, entire (?) 



Length of mouth 9 6 



Length of nose to eye 13 



Length to pectorals 20 



Length of pectoral 15 



Length to dorsal 41 



Length of dorsal 11 6 



Height of dorsal 10 



Width of taU 22 



Skull : Length, entire 18 



Length of nose 8 6 



"Width at orbit 9 5 



Width at notches 5 6 



Width of middle of beak 3 6 



Width of lower jaw at condyles . . 8 



Bladebone broader than high, with long acromion and a promi- 

 nent articulation (t. 11. f. 9). Arm-bones very short ; fingers four, 

 short, outer longest, second rather shorter, third and fourth very 

 short. Ear-bones large (see Van Beneden, I. c. t. 1. f. 7 & 8). 

 Vertebrae 90 or 94. The atlas and axis only anchylosed ; the rest 

 of the cervical vertebrae free. Scapula large. Thumb without a 

 phalange. 



Skeleton, Mus. BruxeUes ; Louvain ; at Mus. Copenhagen, Kiel, 

 and Berlin. 



c. £eak very short. Rostrum of skull only as long as the brain-cavity. 

 Teeth nearly to the notch. 



9. Lagenorhynchus leucopleurus. White-sided Bottlenose. 



Skull: brain-cavity large, high at the top behind the blowhole. 

 Nose nearly as long as the brain-cavity, gradually and regularly 

 tapering on each side. Triangle in front of the blower flattened and 

 concave behind, with a slightly raised, lozenge-shaped space in the 

 front half. 



Above bluish-black, beneath white, with a large, oblique grey or 

 white longitudinal streak on the hinder part of each side. Teeth ^, 

 smaU, acute, curved. 



Delphinus Tursio, Knox, Cat. Prep. Whale, 29, 1838 ; Ann. Sc Mag. 



N. H. 1864, xiv. t. 3. 

 Delphinus leucoplem-us, Rasch, Nyt Mag. for Naturv. 1843, iv. 97 ; 



Mag. Zool. 1843, 369 ; NHsson, Skand. Fauna, i. 598. 

 Delphinus Ibsenii, Eschricht. 

 Lagenorhynchus leucopleurus, Ch-ay, Zool. Hrebus ^ Terror, 34. t. 3 



