32 BULLETIN 171, UNITED STATES NATIONAL MUSEUM 



The canine and second molar are nearly identical in size with these 

 teeth in the Port Kennedy jaw. AI2 has an occlusal surface as that in 

 Cope's specimen, but not so tuberculate as in Arctodus pristinus Leidy ; 

 however, the external surface is deflected as in Leidy's specimen 

 (Leidy, 1860, pi. 23, figs. 3, 4). Arctodus floridanus Gidley (1928) is a 

 distinctly smaller species approaching closely the living Tremardos 

 inornatus Gervais. The second molar from Cumberland Cave is 

 noticeabl}^ narrower than in the western forms of Tremarcfotherium. 



The Franksto^vn Cave form, referred by Peterson (1926) to Arc- 

 totherium haplodon, compares closely in size with the lower jaw from 

 Port Kennedy. M2 in our specimen is similar to that in the Carnegie 

 Museum specimen and shows only a small difl'erence in the outlme of 

 the external surface. In the general appearance of this tooth the 

 Cumberland Cave form is perhaps closer to the Port Kennedy form 

 than is the figured specimen from Frankstown Cave. 



The astragalus of the partial skeleton, U.S.N.M. no, 8180, referred 

 to Arctodus haplodon corresponds very closely to the dimensions given 

 by Cope for the Port Kennedy A. haplodon, but the third metatarsal 

 is distinctly smaller than that measured by Cope. It seems probable 

 that the difference is to be accounted for by size variation between 

 individuals in the Port Kennedy fauna. The foot bones of the 

 Cumberland Cave specimen are noticeably small compared to Trem- 

 arctotherium simum (Cope), according to dimensions given by Merriam 

 and Stock (1925), although the tibia has nearly the proportions of that 

 in the Potter Creek Cave form. T. calijornicum (J. C. Merriam) from 

 Ranclio La Brea is very much larger (Merriam and Stock, 1925). 



Family MUSTELIDAE 



MARTES PAR APENNANTI Gidley and Gazin* 



Figure 15 



Type. — Anterior portion of male skuU (fig. 15a), U.S.N.M. no. 

 8010, carrjdng most of the cheek teeth of the left side. 



Material. — In addition to the type there are 10 specimens in the 

 collection, consisting of lower jaws and skull fragments with teeth. 

 One pair of maxillaries, U.S.N.M. no. 12336, with nearly all the cheek 

 teeth on both sides, has a fragmentary right ramus of the mandible 

 associated. 



Specific characters. — Size intermediate between Maries pennanii and 

 M. americana. Skull construction, as far as can be determined, nearly 

 as in M. pennanti. Upper carnassial relatively shorter than in M. 

 pennanti with protocone more forward m position as in M. americana. 

 Upper carnassial with uncovered and well-developed external median 

 rootlet as observed in M. pennanti. j\i' relatively short anteropos- 

 teriorly with metacone and cingulum posteroexternal to m.etacone 



» Gidley and Qazin, 1933, pp. 347-349, fig. 2. 



