CETACEA. 129 



Dimensions of skull in the (no. 1) British Museum : no. 2. of 

 skull of female in Dr. Dickie's Collection : 



No. 1. No. 2. 



in. lin. in. lin. 



Length, entire 20 6 22 



ofnose 12 13 5 



teeth-line 10 11 



Width at notch 3 10 



at orbit 79 70 



of middle of beak 20 20 



of lower jaw 17 18 



of symphysis 56 60 



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

 behind, teeth ff . 



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 f f. 



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

 jaw like var. 1. 



Dr. Dickie's skull : Teeth f f ; 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. The type of the genus Inia has been 

 confounded with this species. 



3. STENO COMPRESSUS. The NARROW-BEAKED DOLPHIN. 



Nose of skull much compressed, attenuated at the tip, -f the 

 entire length, 3 times as long as its width at the notch ; teeth 

 conical, acute, f ; head narrow, and rather compressed at the 

 orbit. 



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



Steno compressus, ZooL Erebus fy Terror, 43. t. 27, skull. 



Inhab. ? 



a. Skull. The specimen figured in the Voyage of the Erebus 

 and Terror, pi. 27. 



b, c. Two skulls. 



d. Skull. South Sea. Antarctic Expedition. Presented by 

 the Admiralty. in. 



Length, entire 20^ 



ofnose 13 



of lower jaw 17 



ofsymphysis 6~ 



Width of notch 3 



at orbit 6f 



F5 



