592 DR. J. E. GRAY ON A NEW WHALE. (Nov. 22, 
tebra or atlas, but produced far beyond it ; and it is thickened below 
and at the end, which is considerably dilated. The lower process of 
the third vertebra is much smaller, or rather compressed, than that 
of the preceding one ; and the lower processes of the fourth vertebra 
are similar, but much smaller still, and also shorter. They are con- 
fluent together at their base, and with the base of the process of the 
second vertebra. The other vertebree are without any lower lateral 
processes. The neural canal is very large, nearly circular in front, 
being nearly as high as wide; at the hinder end it is transverse, 
trigonal, nearly four-fifths as wide as the width of the articulating 
surface of the first dorsal vertebra, and about two-thirds as high as 
broad. The outer surface of the united arches is very convex and 
broad, with a broad triangular disk in front, marked with a central 
keel; and the upper surface is keeled, with convex sides, behind. 
This mass is so unlike the mass of the cervical vertebrze of the 
Greenland specimen of Balena mysticetus in the College of Surgeons 
(which, through the kindness of the Council of that Society, I have 
been able to examine and figure), that I am inclined to think that it 
may belong to another species, and is probably the cervical vertebra 
of the Whale which Eschricht has described under the name of 
Balena biscayensis. They differ in the form of the lateral processes 
of the atlas and other vertebree, and in the manner in which they are 
soldered together, and especially in the external form of the neural 
arch. 
The cervical vertebree of Lagenocetus latifrons, as of Hypero- 
don, are united into a single mass by the union of the bodies of the 
vertebrze, the neural arches, and the lateral processes. 
The united neural arches of the first cervicals are produced, and 
form a large cone (nearly as high as the height of the body of the 
vertebra), which shelves down before and behind to the upper-part of 
the neural canal, and on the side to the base of the mass, or the end 
of the large lateral processes of the second vertebra, the upper part of 
the sides being marked with the long, deep grooves through which 
the nerves come out. 
The atlas appears to have no distinct lateral processes; or what there 
are are so united to the very large, high, broad, single lateral process 
of the second vertebra as not to be distinguished from it, except by 
the existence of the first groove for the exit of the nerves in the upper 
part of the body. The lateral process of the second vertebra is 
massive, conical, and much produced below, on a level with the lower 
edge of the articular cavity, giving the mass, when viewed in front, 
an irregular triangular shape. 
The third cervical has a broad, short upper lateral process, which 
is only free from the mass at the end; and this projection is the first 
appearance of a distinct upper lateral process. The lower process 
is like, but smaller than, the lower process of the second vertebra, 
and united to the back part of it, making part of the large inferior 
lateral prominence. 
The fourth and fifth have a similar upper lateral process to the 
third, but of a much smaller size, the three last being very small— 
