36 
Clayton E. Ray, Elaine Anderson, S. David Webb 
length 12.3, width 5.1, length of trigonid 8.4; depth of jaw below Mj- 
13.0, width 6.8. In most of these dimensions the specimen lies near 
or below the lower extreme of the OR in T. macrodon; Pj and Pj in 
particular are smaller than in any other specimen. As pointed out, 
however, these teeth are highly variable in size and are of low 
diagnostic value. Although this specimen slightly extends the OR in 
several variates, we assign it to T. macrodon. 
The specimen is from Bevins Pit 2, near Channing, Old- 
ham County, in the northwestern part of the Panhandle of Texas. 
This unpublished locality is within the Rita Blanca Creek drainage 
that includes the Blancan Red Corral local fauna (Schultz 1977:131, 
fig. 5), and has produced a Blancan fauna (Tedford, pers. comm.). 
Also in the collections of the American Museum of Natu- 
ral History are casts of five mandibular rami of Trigonictis from the 
University of Nebraska State Museum. Four of these are from the 
Broadwater fauna, Morrill County, Nebraska, and clearly represent 
T. cookii (length of Mp 10.7 or less), not T. macrodon. If the pub- 
lished records (Schultz et al. 1951: table 1; Hibbard 1972b:128, 131- 
134) for the larger species are correct, they must have been based on 
other specimens. The fourth specimen, from Hooker County, west- 
central Nebraska, represents T. macrodon (length of Mj- 13.4). 
UF/FSM 18085, isolated right P-, length 9.9, width 6.6. 
Its size does not serve to allocate the tooth unequivocally to either 
T. macrodon or T. cookii, and we record the specimen only as 
Trigonictis sp. 
The specimen is from Inglis I A, Citrus County, Florida, 
of early Irvingtonian age (Webb 1974:29, table 2.1, fig. 2.1). This 
late occurrence and the size and robustness of the specimen are 
compatible with the record for Haile XVI A, and reinforce the 
suggestion that a derivative Trigonictis extended into the Irvingto- 
nian of Florida. 
