PEOBOSCIDEA. 
311 
excepting that the cones of the more simple side of the crown are more dis¬ 
tinctly divided into an inner and an outer, and that the posterior one is 
wanting from the penultimate cone of the opposite side. There are also 
other smaller tubercles on the sides of the valleys. Length, 0“.140; width, 
0“.082. 
Fragments of various sizes of the tusks of this animal are common in 
the Santa Fti marl, but, owing to their great fragility, they are difficult to 
preserve. A number of attempts to obtain them were made, but the pieces 
w’ere either broken up in excavating or transporting them. The most solid 
fragment includes about a foot of the extremity. Its section is round, with 
two flattened sides. One of these is marked with longitudinal shallow strii- 
form grooves and is the side which is worn obliquely by attrition at the 
extremity. The groove-like lines were probably covered by a layer of 
enamel. I observed such a layer, which formed a narroAv band on the side 
of an extremity of a tusk, which I did not procure. The diameter of a frag¬ 
ment at seven inches from the apex is three inches. 
The greater part of a small tusk is preserved, which probabl}^ belongs 
to the lower jaw. It is larger than the one found in place and above 
described, and is of a different form. One side is flat and the other presents 
two oblique faces, one wider and one narrower; the section being thus 
depressed-triangular, with rounded angles. The entire surface is coarsely 
striate-grooved, excepting where concealed by a nearly smooth coat of 
cement. Long diameter, 0“.060. 
But few vertebrae were procured. The most characteristic of these is 
tlie dorsal centrum of an immature animal, lacking epiphyses. It is from 
the anterior part of the series, and is strongly opisthocoelian. The inferior 
surface is obtusely angulated at the front middle line. The capitular fossae 
are strongly pronounced, and the posterior basal border of the intervertebral 
foramen is revolute. 
Mcamreinents of a dorsal vertebra. 
Length of the centrum..... 
Diameter of the centrum { 
Width of the neural canal at the base. 
M. 
0. 047 
0.192 
0.113 
0. 054 
