1897.] NATURAL SCIENCES OF PHILADELPHIA. 309 



measurements, that the so-called scalopsoides of Bachman is even a 

 tenable subspecies. 



South Carolina and Georgia specimens, however, may show 

 greater differences. Owing to the highly fossorial habits of this 

 vole, spending like a mole nearly its whole life underground, it is 

 not subjected to the ordinary vicissitudes of environment which 

 have caused subspecific variations in other members of its family. 



" Common at Currituck, where they were obtained in runways in 

 the escarpment along shore and in the Juncas in wet woods along 

 the shore." 

 5. Fiber zibethicus (L.). Muskrat. 



Concerning the only specimens of this species, sent to him from 

 Currituck, Dr. Merriam informs me by letter : " The muskrat has 

 the small teeth of the ordinary zibethicus, thus differing from the 

 Dismal Swamp form. 



"Muskrats were reported as fairly common at Chapanoke. None 

 were taken there, but at Currituck they were numerous in the 

 marshes, where two specimens were secured." 



6 Peromyscus leucopus (Raf.). Carolinian Deer Mouse. 



Twelve skins from Chapanoke and ten from Currituck represent 

 this species. They do not differ in color and measurements from a 

 large series taken at the same time in southern New Jersey, which 

 are considered typical of Rafmesque's species. 



" The commonest species met with, being taken in all kinds of sit- 

 uations." 



7. Peromyscus gossypinus (LeC). Northern Cotton Mouse. 



Two adult specimens from Currituck are the most northern record 

 of this species known to us. The strong distinctions, both cranial 

 and external, separating this species from its small congener and 

 associate leucopus at Currituck, are apparent at a glance. The hab- 

 itat of the two overlaps at this point precisely as it was found to do 

 by the senior author in the bottom lands of western Tennessee, 

 where the mississippiensis form of gossypinus occurs. 



The specimens were " obtained in a patch of Juncus in a wet 

 piece of woods on Currituck Sound." 



8. Peromyscus aureolus (Aud. & Bach.). Golden Deer Mouse. 



Four specimens from Chapanoke are in the collection. 



9. Reithrodontomys humulis (Aud. & Bach.). Eastern Harvest Mouse. 



Sixteen skins, two only of which were taken at Chapanoke, are in 



the Rhoads' collection. "Several specimens were taken at both 

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