30 Clayton E. Ray, Elaine Anderson, S. David Webb 
protuberance in the position of a metaconid, and an undulation on the 
posterior crest of the principal cusp. A small pressure facet on the ante- 
rior margin of the crown reflects contact with Pj in life, Mj- is robust, with 
a strong, discrete metaconid and hypoconid; its deep, closed basin is 
bordered posteriorly and lingually by a crenulated crest of uniform height. 
A posterior pressure facet evidences contact with Mj, the alveolus of 
which indicates a large tooth with a root of circular cross section, in 
contrast to that in other specimens of T. cookii, with root cross section 
antero-posteriorly enlongate and narrower posteriorly. 
Measurements. — See Tables 1-3 for measurements and statistics of T. 
cookii, and see Measurements under T. macrodon for discussion of dis- 
tinction in size between the two species. Table 2 shows that UF/FSM 
27509 falls within the observed range of virtually all available measure- 
ments for the meager series of T. cookii, and below that for T. macrodon. 
Nevertheless, the toothrow of the Florida specimen is crowded overall 
and the teeth broad in comparison to specimens from Idaho (Fig. 7D-F). 
Relationships. — For a discussion of the relationships of T. cookii see 
this heading under T. macrodon. The relationships of the specimen from 
Haile XVI A remain uncertain. Its morphological peculiarities, the possi- 
ble pertinence of the humerus from the same deposit, and the Irvingto- 
nian age of the fauna, suggest the possibility of a late, derived species. 
However, the difficulty experienced by others in interpreting series of 
fossil galictine mandibles in the absence of skulls recommends caution. 
Therefore, we prefer to assign this isolated jaw to T. cookii pending 
recovery of supplementary material. 
ACKNOWLEDGMENTS. — Knowledge of the later Cenozoic terres- 
trial mammalian fauna in the eastern United States is extremely limited 
as compared with that in the western states. Since the opening of the vast 
fossil fields of the west more than a century ago, professional paleo- 
mammalogists understandably have devoted much less attention to the 
relatively unproductive eastern states, where there are no vast exposures 
of fossiliferous strata and where results of collecting are apt to be 
meager. However, a modest renaissance is underway in the east, largely 
as a result of the energetic and effective efforts of an increasingly sophis- 
ticated and numerous cadre of dedicated amateurs. In North Carolina, 
these hobbyists recently organized themselves as the North Carolina Fos- 
sil Club; and in Florida they have formed the Florida Paleontological 
Society. The present report provides an example of their already signifi- 
cant accomplishments and an inkling of future prospects. Thus, we wish 
to thank two members of the North Carolina Club: Donnie Bailey, 
whose discovery and contribution of the specimen from North Carolina 
stimulated the investigation leading to preparation of this paper, and 
Peter J. Harmatuk, who as usual recognized the specimen as unusual and 
