459 . Transactions.—Z oology. 
gives the principal dimensions of these three skulls, with the soft parts 
attached and as far as they could be ascertained ; but, as soon as they are 
macerated, I shall offer some further observations on their anatomical 
structure :— 
TABLE of Measurements of Three Skulls of Oulodon grayi, with the greater portion of 
Soft 
. 
parts adhering. 
SKULL I. | SKULL II. | SKULL III. 
—— Probably | Probably Probably 
Female, Male, Male, 
Own. aged. young. 
Height of skull from top of nasals (skin preserved) to 
lower border of pterygoids, the latter lying ex- 
ER IN HIM OIM Fr, IN. 
Ms ius v ve ES T -» [011183 | 0 1138 | O. 9:12 
Greatest breadth of skull across post-orbital processes 
of frontals .. Sii PN m ds *|1 048 | 1 088 | 0 9-51 
Length of skull from crest of nasal bones to anterior 
border of rostrum in a straight line 4. [12 5&46 | 2 3:42 | 1 5:07 
ngth of ramus of lower jaw, soft parts preserved, 
on anterior bord «à ee $i i :|2 762|2 603 | 1 775 
From gape* of mouth to anterior border of lower 
ja us js Ls y a e -- | 1 650) 1 487 | 0 1005 
Erom anterior border of lower jaw to centre of tooth | 0 10-75 | 0 1012 | 0 5: 
From centre of tooth to gape of mouth ay S510 7°75 | 0 6°75 | 0 505 
Breadth of lower jaw to centre of tooth i -.|0 2:31 | 0 269| 0 175 
Distance from extremity of rostrum to first anterior 
| tooth .. x SM e : -- | 01106 | 0 10:75 | 0 5-62 
Distance from gape to end of teeth 0 1:02} 0 1:37] 0 1-40 
B. v Te Eee TO bart 
| Opening of blower, the two extremities slightly 
| directed backwards, abont .. ae 2 es 
450 | 0 4:50 | 0 3:25 
| Number of teeth in upper jaw .. vi TE. 5 19 
I should have liked to give also in this list the breadth of the rostrum 
at the ante-orbital notches, as it would have given another important point 
for comparison ; but the coverings prevented this. Also I was not able to 
give the total length of each skull, owing to the occipital portion being cut 
off, but the length of the skulls from crest of nasals to anterior border of the 
rostrum, as well as the length of the ramus of each mandible, will supply 
this deficiency, and offer us sufficient material for comparison. Examining 
the skulls separately we find that the one marked No. 1 is longer but 
narrower than No.2. This is still mor 
two rostrums with each other, that of sk 
rower than that of skull No. 2. The same observation applies to the man- 
dibles, which in No. 1 only widen very gradually, and are much narrower 
all along than those of skull No. 2. ° In fact, if both skulls had been ob- 
tained separately, I believe that they would probably have been assigned to 
two distinct species. When the skull of No. 1 was first examined by me 
* The drying of the skin has been 80 unequal in the different specimens, and even on both 
sides of the same skull, that the position of the gape cannot be fixed with precision. 
e striking when we compare the 
ull No. 1 being considerably nar- 
