312 Proceedings of Royal Society of Edinburgh. [sess. 
posterior border of the tail, in a bulbous expansion. In its 
anterior part the upper half of this band was yellowish-brown 
and the lower half was white, but posteriorly it was entirely 
yellowish-brown. The belly was white from near the tip of the 
lower jaw to 4 inches behind the genital fissure, on each side of 
which was a longitudinal greyish-black patch. Between the 
white belly and the band on the 'Side of the body the colour 
of the skin was greyish -black, and a slender band similarly 
coloured extended forward from the base of the flipper to the 
angle of the mouth. The ventral surface of the tail was greyish- 
white. 
Skeleton . — The length of the female, 6 feet, was less than that of 
a male, 8 feet 3 inches, described by Dr Duguid,* a difference due 
partly to sex and in part to the ossification in the former being in- 
complete, as the epiphysial plates were not fused with the bodies 
of the vertebrae. The Dunrobin specimen, therefore, was not 
adult, but in the stage of growth which may be called adolescent. 
The spinal column was 54f inches long. When examined with 
the vertebrae undisturbed in their natural position, the vertebral 
formula was cervical 7, dorsal 15, lumbo-caudal 58, in all 80, 
which is less than the number 82 said to have been present in 
some specimens of this species, and materially below the 88 to 92 
vertebrae found in Delphinus albirostris. 
The 1st, 2nd, and 3rd cervicals were fused in their bodies, 
neural arches, spines and transverse processes into a relatively 
massive bone. Intervertebral discs were present between the 
bodies of the other cervicals, which were flattened, and the 
whole series formed a short, stunted, compressed neck. The 
dorsals had relatively long spines and articulated with fifteen 
pairs of ribs. The first five pairs were jointed with the bodies 
and transverse processes of the corresponding vertebrae ; the 
remaining ten pairs with the free ends of the last ten dorsal 
vertebrae. 
The lumbo-caudals diminished in size before they reached 
the tail, and the transverse processes ended at the 39th post- 
costal vertebra ; in the tail itself fifteen vertebrae were repre- 
sented by only the bodies. The tips of the lumbar and dorsal 
* Ann. and Mag. Nat. Hist., vol. xiv., 3rd series, p. 133, 1864. 
