82 CETACEA. 



in circumference. Teeth |f-ff . Vertebrae 65 : cervical 7 ; 

 dorsal and ribs 13; posterior 45. V- shaped bones commencing 

 between the thirty-fourth and thirty-fifth vertebrae. Length of 

 base of cranium 11, of spinal column 42 inches = 53. Weight 

 of cranium 1 Ib. 1 oz., of trunk and extremities 2 Ib. 15 oz. = 4 Ib. 



2. Of a female 74 inches long, killed in the Thames : has cora- 

 coid clavicles. It also differs from the preceding in the following 

 particulars : There are only twelve ribs on each side (24) ; the 

 vertebrae towards the caudal extremity are much more slender 

 and delicate, while the transverse and spinous processes of the 

 dorse 1 and lumbar vertebrae are much broader and stronger; the 

 cranium is considerably smaller and narrower. The elevation of 

 the occipital bone less, but more rounded. Condyles of the oc- 

 cipital bone greatly less, yet the weight of both skeletons is nearly 

 equal. There are only 64 vertebrae, but the last is evidently 

 wanting, and has been lost. Knox, p. 32. A foetus was taken 

 from the uterus of the female porpoise (whose skeleton, No. 1, 

 is above referred to from the Firth of Forth) ; it measured, from 

 snout to centre of tail, 26 inches; circumference 16 inches. Its 

 great bulk, considering the size of the parent porpoise (56 inches), 

 is remarkable, and renders the supposition that the porpoise does 

 not suckle her young extremely probable. Knox, p. 34. n. 104. 



This difference in the skeleton shows the probability of there 

 being two species confounded on our shores, or else that there are 

 great variations in the bones of this animal even of the same sex. 



c. Upper and lower jaw with many teeth, rarely deciduous 

 with age. Wings of the jaw -bone horizontally produced 

 over the orbits. Delphinina. 



Delphinina, Gray, Zool. Ereb. Terror, 30. 



* Head rounded in front, not beaked. Nose of skull scarcely 

 so long as the brain-cavity. Dorsal distinct. 



8. GRAMPUS, Gray. 



Head rounded, forehead rather convex. Teeth conical, often 

 truncated in the front half of the lower jaw. Dorsal distinct, 

 low, rather behind the middle of the back. Pectorals ovate, 

 rather elongate. 



Skull depressed ; intermaxillaries dilated, covering great part 

 of the maxilla above, rather swollen behind in front of the blow- 

 ers, the hinder wing of the maxilla horizontal and rather thick- 

 ened and bent up over the orbit, and slightly dilated and reflexed 

 just in front of the notch. 



Grampus, pars, Gray, Spic. Zool. 2, 1828. 

 Grampus, Gray, Zool. E. fy T. 30, 1847. 



