No. 2324. PECCARIES FROM CUMBERLAND CAVE—QIDLEY. 657 



Tayassu;^ space between the incisive border and the canines not 

 laterally constricted, maxillary buttress for reception of the relatively 

 less heightened lower canine much as in Tayassu; characters of up- 

 per facial region and posterior portions of the skull unknown. 



The foregoing is not intended as a final revision even of the Pleis- 

 tocene and living peccaries, much less of the entire group and the fol- 

 lowing is by no means a serious attempt at straightening out all the 

 limitations of Pleistocene species which still seem somewhat con- 

 fused.^ 



Genus PLATYGONUS LeConte. 



Type species. — Platygorvm compressus LeConte. (For defini- 

 tion of genus see p. 656.) 



Hay has followed Leidy in considering P. alemani Duges as 

 synonomous with P. vetus Leidy, and has combined P. compressus 

 Leidy with P. leptorhinus Williston ; yet comparisons of figures and 

 descriptions together with the material at hand, which includes part 

 of the type of P. alemani^ indicate differences which to me seem suffi- 

 cient to retain all four species as valid. They may be therefore 

 briefly characterized as follows: 



PLATYGONUS COMPRESSUS LeConte. 



Synonym, {f) — Euchoerus Tnacropus Leidy. 



Type. — Fragments of a skull and jaws and a few pieces of other 

 bones. Locality: near Galena, Illinois. Described by Dr. John L. 

 LeConte in 1848.^ 



Diagnosis. — A species of moderate size; total length of cheek tooth 

 series, 74 to 80 mm. ; diastema behind canine (upper jaw) about one 

 and one-half times the length of the premolar series; m^ dis- 

 tinctly longer than wide except when greatly worn by use. 



The type specimen is too fragmentary to show other features. 

 If, however, the specimens from near Rochester, New York, de- 

 scribed under this species by Leidy,* have been correctly referred, the 

 following distinctive characters may be added : Inion relatively low, 

 with sagital crest well arched; temporal fossae short, anteropos- 

 terior diameter being about twice that of the orbit ; vertical expan- 

 sion of jugal less than diameter of the orbit. 



^Mylohyus resembles Tayassu in much the same way as PJofysroMMS resembles Pecari, 

 but in Mylohyus the premolars and milk teeth are more progressive than those of either 

 of the living genera. 



2 A complete revision of the peccaries in general, including those of the Pleistocene, 

 Is a work much needed, but this can not satisfactorily be done except by a critical 

 restudy of actual types and all other available material. Such a critical restudy by the 

 present writer is at present not practical as many of the types and other important 

 specimens are in other Museums, and figures and descriptions may not be relied upon 

 In a work of such extensive proportion as would be thus involved. 



3 Amer. Journ. Sci., vol. 5, 1848, p. 103, figs. 1 and 2. 

 * Leidy, Trans. Wagner Free Inst., 1889, pp. 41-50. 



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