104 Si/iKiiitdiii)/.'^ CodjK'iii and Sipi(ijd<)iiii/s SldiicL 



It is hard to understand just what Mr lihoads means. I can 

 find no diflfereuces whatever between the lower jaws of S. donci 

 and rooprrii. 



Let us now look at the geographical distribution oi St/iuiptonnjs 

 rooprrii, and bearing in mind the powerful effect of well defined 

 faunal areas on a species, see what we should expect the 

 Si/ri(rj)to)iit/'^ of south central New Jersey to be. 



We have Sj/rtaptoiiii/.-^ roo}>rrii fi'om Minnesota, Iowa, Indiana, 

 Ohio, North Carolina, Maryland and Massachusetts; would it 

 not seem extremely improbable that we should find anything 

 but rooprrii in New Jersey? 



Prof. Baird, in his original description of Si/imiifoiui/s rooprrii, 

 says the specimen was "received from Mr. William CJooper of 

 Hoboken. No locality was assigned, but the animal is undoubt- 

 edly North American, probably from the New England States 

 or New York; possibly from Iowa or Minnesota." Why not 

 even more probably from New Jersey, as Mr. Cooper lived there ? 



Since writing this article I have taken two more Si/iKiptoirri/s 

 cooperii iu Plymouth County, Mass.; one at Plymouth, January 

 15, 1894 [ad. 9 ], and one at Wareham, March 31, 1894 [ad. $ ]. 

 Both were caught in old cranberry hogs, associated with Arvicola 

 Hiiarius and using their run-ways. 



