BALiENOPTERA RO STRATA. 
121 
The following are some of its dimensions : 
SKULL OF BALiENOPTERA ROSTRATA. 
Length in straight line 
Greatest width across squamosals 
Length of lower jaw in straight line 
Width of lower jaw 
Length of superior maxillary bones 
Length of intermaxillary bones . 
Length of nasal bones . 
ft. in. 
3 0 
1 4 
2 8§ 
1 7 
3 Hi 
1 11 
0 2| 
All the bones of the skull were arranged symmetrically on 
each side of the median line. 
Longest blade of whalebone, which was of a light horn 
colour .... 
. 0 
4§ 
ATLAS. 
ft. 
in. 
Height .... 
. 0 
Width .... 
. 0 
n 
Height of neural and axial foramen 
. 0 
3f 
Width of neural and axial foramen 
. 0 
21 
AXIS. 
ft. 
in. 
Height .... 
. 0 
5f 
Width .... 
. 0 
8f 
Width of body 
0 
5 
Height of body 
. 0 
21 
I had some difficulty in defining the relations of the Atlas and 
Axis, which Professor Flower, of the British Museum, cleared up 
for me with great readiness and courtesy. 
EAR-BONES OF LESSER RORQUAL. 
(Balcenoptera Rostrata ) 
a Tympanic bone, extreme width 3 in. 
h Zygomatic process. c Periotic Bone. d Pterygoid process. 
Extreme width from b to d 5 in. 
