PTT" 



932 



MONO(}RAP118 OK NORTH AMERICAN RODENTIA, 



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ncdy l)()nc-cav(>, Moiitgoiiiory Count)', Peiiiisylvaniii. Tlieso rnnuins iiidicato 

 a species iiuicli larger than S. ptinoUus Copo, and agreeing in size witli S. 

 hufLwniu.i, to wliicli it seems not unlikely referable. 



SCIURUS PANOLIUS Cope. , ...^ . 



Seiiiruii pamliua Cope, Proc. Amer. Pliil. Soc. xi, 1863, 174, pi. iii, fig. h. 



This species is based on a portion of n mandibular ramus "containing 

 two molar teeth, and the included portion of the incisor, the coronoid and 

 vertical ramus being lost"'. It is from the caves of Wythe County, Virginia. 

 This fragment indicates a species about two-thirds the size of Sciuius hud- 

 sonius, and appears to differ considerably in other respects from the corre- 

 sponding portion of the lower jaw of S. hudsonius. While its size is that of 

 Tamias striatus, it is a true Sciurus, and the smallest species of the genus 

 thus far known from North America. i 



SCIURUS RELICTUS Cope. . - 



" Paramio ie/ic(u» Corn, Synop. New Vert, of Colornjo, 1873, ;t." '■ 



Sfiiini* rt«c(«» Cope, Aun. Rep. U. 8. Geo). Snrv. Terr, for 1873 (1874), 475. . ■■ 



"Size that of the Chickaree (Sciurus hudsonius)." Described from "two 

 lefl mandibular rami, witli all the teeth conip'ete". Said to "not differ in 

 any degree from corresponding parts of the existing Squirrels". Found in 

 the "Tertiary of Colorado", the exact locality not being given, 



TAMIAS L^VIDENS Cope. .J; 



Tamiaa tet'ident Cope, Proc. Amer. Phil. Soc. xi, 1869, 174. 



This species, described from "the distal half of a mandibular ramus", 

 with the first molar teeth in place, is too imperfectly known to enable one to 

 say much respecting its character or affmities. Its size seems to have beea 

 that of T. striatus, from which species it, however, differs in several important 

 particulars. In T. lavidens, the first lower molar has two anterior cusps, as 

 in T. lateralis and T. asiaticus var. quadrivittatus, instead of the single one 

 seen in T. striatus and T. Iiarrisi. The portion of the ramus anterior to the 

 molars is also slenderer than in T. striatus, and the incisors lack the fine stri- 

 ations of the anterior surface seen in the last-named species, but have "three 

 narrow grooves on the outer longitudinal angle". From the bone breccias of 

 caves, Wythe County, Virginia. 



