Pies 
seo) 
Fossil Bons from Teninestborand Tera. 249 
» As the incisive teeth, the condyle, and posterior margin of the 
saloasdiane branch, are wanting in the Texas specimen, the meas- 
urement is only approximative ; but there cannot be much error, 
as the data are sufficient to give a very certain result. 
Fig. 4 represents the part of a left half of the upper jaw of a 
tapir, perhaps of the same individual, as the specimens were found 
within a few feet of each other. ‘The teeth 
are represented from the inner side. ‘They 
are the four posterior molars. On the outer 
side of the specimen, and arising from a 
point corresponding with the point of junc- 
ture of the two last molars, there remains : 
a portion of the zygomatic arch. ‘The two anterior molars are 
considerably worn, the third less so, and the posterior one not 
at all. 
pe Among the bones of this collection, are numerous fragmen- 
imens of the bones of the mastodon and elephant. ‘Those 
of the elephant, particularly of the teeth, are much more nume-- 
rous than those of the mastodon.t ‘There is one tusk of a mas- 
todon which measures eleven feet in length, and twenty six inches 
in circumference in its largest part. It has a double curvature. 
. There are two claw-bones of one of the Megatheridex, 
perhaps of the Oryctotherium ? ? 
5. There is likewise a very imperfect fragment of a skull, of 
very solid, hard, and heavy bone, which has been thick, and of a 
large celine structure, especially at the occipital part of the h 
The foramen magnum and condyles. have been perpendicular to 
the basal bone, and to the direction of the base of the brain and 
the spinal éolumn. The remains of the frontal portion of the 
head makes a large angle (perhaps 30°) with the basal bone. 
There is a well developed petrous bone on the right side of the 
head, the opposite one being wanting. The brain had numerous 
éorivolutiohs, as shown by the marks in the skull. The bone is 
perhaps thirteen or fourteen inches in length, and the cranial cay- 
ity would perhaps contain a quart. This cavity is of an oval 
shape, but narrowing rapidly” forward. I can form no accurate 
Fig. nee size Sale 
* Fig. 3, with which fig. ‘ eave pene is ancorrectly printed o one third, instead 
of one fourth, the natural s' 
t I have remarked the same Siiedoditiilesds of the nape ees: over the mastodon 
remains in collections made in Missouri. 
Seconp Series, Vol. I, No. 2.—March, 1846. 32 
