PSEUDORCA CRASSIDENS. 
203 
Length of the head measured from the occipital condyles 
to the tip of beak . 
Length of the head measured to the middle of the in¬ 
ferior margin of the occipital foramen 
Length of the cranial portion measured from the occi¬ 
pital condyles to the posterior wall of the nasal 
canal ...... 
Length of the beak measured from its origin on a 
level with the anterior extremities of the zygomatic 
bones ...... 
Greatest breadth of the head (across the zygomatic pro¬ 
cesses of the temporal bones) 
Breadth of the head across the postorbital processes of 
the frontals . 
Breadth across the occipital ridge at its union with the 
temporal ridges ..... 
Breadth across the prominences formed by the fron¬ 
tals, the superior maxillaries and the zygomatic bones 
in front of the orbit .... 
Breadth of the beak at its origin 
Breadth of the beak towards the middle, just before the 
most posterior tooth but two 
Height of the occipital foramen 
Breadth ,, „ . . . 
Distance from the inferior margin of the occipital 
foramen to the posterior margin of the pterygoid 
bones ...... 
Length ol the dental row in the upper jaw 
Length of the lower jaw measured from the condyle to 
its foremost extremity . . . . 
Length of the symphysis . . . . 
Length of the dental row in the lower jaw 
The specimen 
from Asnaes 
(?)• 
The specimen 
from Refsnaes. 
The specimen 
from Middel- 
fart («J). 
1 
j Owen’s fossil 
Phoctfna 
crassidens. 
— 
24" 
24" 
25" 2"' 
— 
23" 2"' 
23" 2'" 
— 
— 
8" 9"' 
8" 6"' 
— 
10" S'" 
11" 
11" 
11" 7"' 
14" 8'" 
14" 10"' 
14" 1"' 
— 
— 
14" 3'" 
14" 4"' 
14" 6"' 
8" 8"' 
9" 
8" 3"' 
— 
13" 
12" 8"' 
8" 3"' 
8" S'" 
8" V" 
— 
8" 1"' 
7" 9"' 
7" 6"' 
_ 
— 
2" 3"' 
2" 8"' 
— 
— 
2" 2"' 
2" 6'" 
— 
8" 2"' 
8" 
9" 8"' 
10" 2"' 
9" 9"' 
— 
18" 6"' 
19" 6"' 
18" 4'" 
19" 2f' 
3" 
4" 
3" V" 
— 
9" 1"' 
10" 2"' 
9" 5"' 
9" 2"' 
When compared with the greater majority of the other Cetaceans belonging to the 
dolphin family, the dolphins to which the one treated of here is most closely allied are all 
provided with rather a small number of vertebrae. The Grampus griseus, one of the forms 
in question having the greatest number, is stated by Cuvier 1 to have only sixty-one. In three 
skeletons of ca’ing-whales from the Faroe Islands, I find the number of the vertebrae to 
naturalists; the discrepancies may perhaps be partly explained by the mutilated state of the skull, 
which may have rendered it difficult to give some measurements otherwise than approximatively; but, 
at all events, they show that we must not overrate the small differences found in some dimensions of 
Owen’s cranium, when compared with those of the Danish crania. I may add in this place, that 
the reason why I have given fewer measurements of the cranium of the Asnses dolphin than of the 
two other crania from Refsnaes and Middelfart, is the mutilated condition of the former. 
1 * Rech. s. 1. Oss. Foss.,’ 4me ed., t. 8, 2me partie, p. 147. 
