218 PROCEEDINGS OF THE ACADEMY OP [1894. 



1. Recent date of fossil remains taken 1)1 contact or direct associa- 

 tion ivith Neotoma magister in. Pennsylvania, caves. — While no data 

 have been preserved as to the relative position in Hartman's Cave 

 of the extinct Dlcotyles pennsylvanicns and CaMoroidex ohioensis 

 witli respect to more recent remains, it is interesting to note that the 

 following mammals, yet existing in America, were found in associa- 

 tion and in precisely the same stages of recent or ancient preservation 

 in the shallow upper layer of the cave floor: — 



Lynx canadensis. Arviaolapinetorum. 



Lynx rufus. Sltomys aniericanus. 



Urocyon cinereo-argeuteus. Neotoma magister. 



Vtdpes pennsylvanicus. Arctomys monax. 



Canis luptis nnbilus. Sciurus niger cinereus. 



Mephitis mephitica. Sciurus carolinensis jyennsylvan icas 



Patorius erminens. Sciurus Imdsoniciis. 



Procyon lotor. Tamias striatus. 



Ursus amevicanus. Lepus sylvaticus. 



Scalops aquaticus. Lepus americaiius. 



Blarina talpoides. Biso^i bison. 



Adelonycteris fuscus. Alces americanus. 



Vespertilio gryphus. Kangifer caribou.. 



Castor fiber canadensis. Cariacus virginianus. 



Fiber zibethicus. Cervus canadensis. 



Erethizon dorsatus. Equus caballus. 



Mus decumanus. Homo sapiens. 



Arvicola pennsylvanica. 



2. The Sonoran derivation of the Genus Neotoma indicates its com- 

 paratively recent post-glacial advent into North Temperate latitudes. — 

 Dr. Coues has attempted to trace, by the scant evidence then known 

 to him, the probable derivation from magister of the four existing 

 species of Neotoma recognized in the jNIonograph of North American 

 Rodentia.'^ The evidence now had, exactly reverses his hypothesis. 



3. The presence of living N magister in the caves where fossilized 

 remains of same occur in various stages of preservation and antiquity. — 

 Magister does not now exist in the Carlisle valley cave. It may have 

 existed there in the early colonial days of Pennsylvania, or its life 

 there may date back to a time when the crests of South Mountain, 



« Mou. N. AmiT. Jiod., 1S77, 29, 30. 



