Dr. H. Burmeister on Glyptodon and its Allies. 301 
tail being somewhat intermediate between the two French 
figures. 
The mesocervical bone of four united vertebre was figured and 
briefly described as containing from,the second to the fifth ver- 
tebra, by Lund in the Transactions of the Academy of Copen- 
hagen, where the author names the animal to which this bone 
belonged Hoplophorus euphractus. The genus Schistopleurum 
must therefore be named Hoplophorus, the two genera being 
perfectly identical, and Dr. Lund’s name the older one. Tis 
other figures of the same animal prove its identity with Schisto- 
pleurum as completely as that of the mesocervical bone. 
As regards the fourth mesocervical bone, with five united ver- 
tebre, Ido not know exactly the species to which it belongs; but 
from the general construction of the bone I am inclined to think 
that it may belong to Glyptodon clavipes, Owen. We have of 
this species a carapace not so well preserved as that figured by 
Owen, awell-preserved pelvis, and some other bones. Somemonths 
ago I communicated to Professor Owen figures of this pelvis and 
of the pelvis of Schistopleurum gemmatum, then named by me 
Glyptodon levis, as also of my G. spinicaudus, now to be named 
Hoplophorus asper, m order to show him the great differences in 
the construction of the pelvis in these three species. The pelvis 
of G. clavipes is the .strongest—the branch of the os pubis, 
which forms the superior boundary of the foramen obturatorium, 
especially being much thicker than in the other two species, in 
which it is as thin as a pencil and much longer, and the foramen 
obturatorium is much larger. As all these characters of the 
pelvis in G. clavipes indicate a stronger and more solid construc- 
tion of the skeleton, I think we are justified in believing that the 
construction of the neck in this species was also stronger than 
in the others. 
The same character of strength, but still more strongly marked, 
is presented by a pelvis of which I have only one side before me. 
This pelvis is more than one-half larger than that of G. clavipes, 
has the same strong pubic branch, anda much narrower foramen 
obturatorium. From the construction of the bone, as well as from 
the general size of the animal, I conclude that the pelvis belongs 
to a very large species, of which we have in the Museum the 
complete tip of the tail. This was described by me in my first 
memoir as belonging to G. tuberculatus, Owen; but having since 
seen this author’s figures copied in Nodot’s work (pl. 9), I find 
that this was a mistake, and that this tail is identical with that 
figured by Nodot, pl. 8. figs. 83-5, copied from the ‘ Ostéographie.’ 
Nodot has described, but not named, the species as belonging to 
two different kinds (pp. 102 & 103). Ife also gives (p. 100) a 
short description of two scales, figured (pl. 12. figs. 6 & 7) as G. 
