234 DELPHINID^. 



a. Part of the upper jaw, teeth large. 



b. Bones of the ear. India. Presented by General Hardwicke. 



c. d, e. Three skulls. 



Dimensions of skull (No. 1) in the British Museum ; No. 2, of skuU 

 of female in Dr. Dickie's Collection : — 



No. 1. No. 2. 



in. lin. in. lin. 



Length, entire 20 6 22 



Length of nose 12 13 5 



Length of teeth-line 10 11 



Width at notch 3 10 



Width at orbit 7 9 7 9 



Width of middle of beak 2 2 



Length of lower jaw 17 18 



Length of symphysis 5 6 6 



Var. 1. Lower jaw rather straighter below and rather wider be- 

 hind ; teeth |-|-. 



Var. 2. Nose much compressed on the side and depressed above, 

 rather larger, rather more than three times as long as wide at the 

 notch ; teeth |-|. 



Var. 3. Tooth-series rather longer, 10" 6'" ; teeth |^ ; lower jaw 

 like Var. 1. 



Dr. Dickie's skull has teeth |^ ; the two front of lower jaw are 

 small, and separated from the rest. A foetus extracted from the 

 womb of Dr. Dickie's specimen had the tail convex at the end and 

 emarginate. 



D. Geoffroyi, Desm., which is the type of the genus Inia, has been 

 confounded with this species. 



There are two skulls in the Museum of the Asiatic Society of Cal- 

 cutta, one of an animal taken near the Nicobar Islands, the other 

 from the Red Sea. — Blyth, Eep. I.e. 11. 



4. Steno compressus. The Narrow-beaked Dolphin. 



Nose of skull much compressed, attenuated at the tip, three-fifths 

 the entire length, three times and a half as long as its width at the 

 notch. Teeth conical, acute, |^. Head narrow, and rather com- 

 pressed at the orbit. 



Delphinus compressus, Gray, Cat. Manun. B. M. 

 Steno compressus, Zool. Urebus Sf Terror, 43. t. 27 (skidl) ; Cat. Cetac. 

 B. M. 1850, 129. 



Inhab. ? 



a. SkuU. The specimen figured in the ' Voyage of the Erebus and 



Terror,' pi. 27. 



b, c. Two skuUs. 



d. SkuU. South Sea. Antarctic Expedition. Presented by the 



Lords of the Admiralty. 



