present no evidence for suspecting a
difference in age, because the order is otherwise unrecorded in the
Torrejonian of New Mexico. The species are in most instances identical
or closely allied with those hitherto recognized. It is evident from
this that the Angels Peak faunule is more closely correlated in time
with the San Juan Torrejonian fauna as a whole than with either the
Dragon fauna or the Tiffanian. In respect to the San Juan Torrejonian,
closest resemblance is to the _Deltatherium_ zone fauna rather than to
the _Pantolambda_ zone fauna (Osborn, 1929:62). The difference in the
faunas of these two zones is largely, if not entirely, facial in
character.

It is not clearly evident, however, that we are dealing with exactly
contemporaneous assemblages when comparison is made between the Angels
Peak faunule and the rest of the San Juan fauna which serves
collectively to define the typical Torrejonian. It may be: (1) that the
Angels Peak faunule is of slightly different age than the latter, or
(2) that the latter is susceptible of stratigraphic subdivision, and
the Angels Peak faunule marks one stage of a sequence in time. This
problem will not be easily solved, and perhaps may never be, for
concentrations similar to that of the Angels Peak faunule are of
infrequent occurrence. It is beyond the scope of the present paper, and
of the present stage of our knowledge of the "Torrejon" fauna, to
discuss at length the possible difference in age, but the following
remarks summarize the matter for the Angels Peak material.

Many of the Angels Peak specimens differ in minor ways from those
previously described from the Torrejonian of the San Juan Basin. Some
of these differences are sufficiently great for the recognition of new
species. Other differences at present are not clearly valid on a
specific level, and it may become necessary to restudy the entire fauna
if satisfactory conclusions ever are reached.

A direct comparison can be made between the Angels Peak faunule, and a
numerically smaller and less well preserved one obtained by the
University of Kansas from a bone concentration near the head of
Kimbetoh Arroyo. The latter faunule presumably is from the
"_Deltatherium_ zone," and hence does not occupy a demonstrably high
position in the "Torrejon," rather, one seemingly down toward the first
known appearance of the fauna. Closely related or identical species of
nine genera occur at both localities. Of these, the s