538 DR. J. MURIE ON THE ANATOMY OF THE SEA-LION. 
The muzzle, as a whole, is slightly truncated. When at rest the long, strong, arched 
vibrissee or whiskers do not project beyond the muzzle, but lie backwards and downwards, 
the course of their sweeping curves giving them an inclination beneath the lower jaw. 
These vibrissee commence at an inch distant from the anterior nasal sulcus, and at their 
roots or origins extend backwards fully an inch and a half. They are small and short 
anteriorly and above, and increase in length and in thickness posteriorly. They range 
in length from half an inch to about eight inches. Their disposition is in parallel 
rows, whereof there are six such rows from above downwards, and seven from before 
backwards. The greater number of these vibrisse are of a pale colour; but several 
are barred with black. 
During life this creature had the power of freely moving about its whiskers. I have 
never seen it twist them round towards the forehead, although this was easily done in 
the dead condition. In this last state the vibrisse freely rotated as much as three 
quarters of a circle; but I doubt if their mobility permitted such during the living 
condition ; at least such a movement has not come under my observation. 
As regards the lower lip and the opening of the mouth, the former is placed rather 
behind the upper lip—the muzzle, as it were, projecting slightly in advance of the 
mandible (Pl. LXIX. fig. 8). The shape of the closed mouth, as seen in the above 
figure, is a wide deep arch, the chord of which from its summit to the angle of the lip 
is rather more than three inches. 
I may here insert some admeasurements of the head as a clue to the relation of parts 
treated of in the last three sections, 
inches, | inches. 
ene ye Depth at lin. behind muzzle . 53 
Girth-at occiput ° .° 4.” ) 2a Depth at extremity of upper lip. 3 
Gimthvatseatss «9 5.) ea) ewe: Depth at do., including mandible 5 
GCN At CYS kw os, on ae, Distance from snout to mid-eye . 5 
Girth at posterior end of bristles 164 Breadth of snout oa 
Girth at muzzle, front of lower Breadth between eyes, following 
pe eeuens eee ene Moe nee CUTIVE, sor cu ee ace ate ee 
Depi-atieats gs % «9 os Breadth between ears . . . . 10 
Depihvaveyess i ee a kell Breadth between the bristle-roots 4 
11. Subcutaneous Deposit of Fat.—On the removal of the skin from the Sea-lion the 
entire body and the extremities are seen to be enveloped in a more or less dense layer 
of soft oily fat. This fatty substance resembles that met with in the Common Seals. 
It possesses appearance and properties intermediate between those belonging to the 
adipose tissue found on the bodies of some Carnivora and the adipose tissue of 
Cetacea. 
This extensive sheet of adipose material is deposited in greatest quantity upon the 
