DESCRIPTION OF A NEW SPECIMEN OF GLYPTODON 547 
the preparation of such a memoir will require some time, I wish at 
present to lay before the Royal Society a preliminary account of 
those particulars in the structure of this animal which must interest 
anatomists in general as much as the special student of the fossil] 
Edentata, in the hope that the notice may appear in the ‘Proceedings ’ 
of the Society. 
The mass of bony fragments which arrived from South America 
has afforded material for the reconstruction of the carapace, and of 
the following parts of the skeleton :—the anterior moiety of the skull 
with the entire palate; the mandible ; some of the cervical, and the 
greater part of the dorsal, lumbar, sacral and coccygeal vertebre, with 
vertebral and sternal ribs ; the pelvis and the hind limbs ; part of the 
scapula, and an entire fore limb. Andthere can be no doubt that all 
these remains belong to one and the same animal, as no duplicate 
bones have been discovered, nor any which there is the least reason to 
believe belong to a different individual. This circumstance gives a 
particular value to the present specimen, apart from the fact that, 
notwithstanding the researches of Professor Owen, of D’Alton, of 
Lund, and of Nodot, our knowledge of the structure of the anterior 
part of the skull, of the vertebral column and pelvis, and of the fore 
limb of Glyptodon and its immediate allies, is either nil or extremely 
imperfect. I now proceed to note the more important and the novel 
anatomical peculiarities which it reveals. 
Of the sku/Z the new specimen exhibits the anterior moiety, from 
the anterior boundary of the cranial cavity to the anterior end of the 
nasal bones, together with the almost entire bones of the face and the 
lower jaw; it thus furnishes a nearly complete supplement to the 
fragmentary cranium, consisting of the brain-case and the nasal 
bones, with the zygomatic processes, formerly described by Professor 
Owen as a part of Glyptodon clavipes, and now set up in the College 
Museum, together with a carapace, a tail, and a hind foot, as the 
typical example of that species'. In the form of the frontal bone, of 
the orbits, of the nasal bones, and of the zygomatic process, the skull 
of the new specimen agrees very closely with that of Glyptodon 
clavipes. From the slighter rugosity of the supraorbital region, the 
less development of the temporal ridges, and the fact that the nasal 
1 The parts thus combined together were not found so associated, and the question may 
arise, whether the skull, hind foot, and tail are really parts of the animal to which the 
carapace (on whose characters the species is founded), belonged. Provisionally I assume 
that they are. But so many difficulties are involved in the precise determination of the 
species of these extinct Armadillo-like Edentata, that for the present I leave the 
question open. 
NN 
iS) 
