169 



COMPAKATIVE MEASUREMENTS. 



Nose to tip of tail 



" " root of tail 



" " occiput 



" " tip of ear 



" " eye 



" " extended hind foot . . 



Lengtli of tail to tip 



" " tail to end of bone , 

 " " fore leg- from knee , 



" " fore foot , 



" " hind leg from knee , 



" " hind foot 



" " longest toe . . . . , 



" " whiskers 



Between eyes 



Between extended feet . . . . 



N. palustris (1022) N. navigator (629) 



Inches. 



5.(50 



2.80 



.95 



1.05 



.45 



3.80 



2.80 



2.68 



.85 



.42 



1.40 



.71 



.27 



.75 



.35 



3..30 



Inches. 



5.17 



2.17 



.92 



3.00 

 2.83 



.38 



.79 

 .25 



The measurements of Neosorex navigator are taken from those 

 given by Prof. Baird, the first five having been made from the alco- 

 holic specimen, and the others after skinning. From this species N. 

 palustris differs in having a shorter tail, although a larger species ; a 

 shorter hind foot and longer fore foot ; in its much darker colors, even 

 the specimen described by Richardson being much darker than that 

 of N. navigator, described by Baird, while the two known specimens, 

 in summer pelage, are still darker. 



From N. (?) Jirribripes it difiers still more widely ; the latter being 

 but 3| inches in length to tip of tail, with the body IJ ; head 1 ; 

 tail 1| ; while the hind feet are only .50 in. instead of .71 ; so that it 

 is not only a much smaller species, but has disproportionately shorter 

 hind feet and tail. 



SoREX Thompsoni, Baird. 



Among the twelve North American species belonging to the 

 restricted genus Sorex, so fUlly described by Prof S. F. Baird, in the 

 General Report on Mammals, this species is remarkable for its small 

 size, it being, in fact, the smallest mammal known to inhabit North 

 America. The three specimens examined by Prof. Baird came 

 respectively from Halifax, N. S., Burlington, Vt., and ZanesviEe, 

 Ohio. 



In the Museum of Comparative Zoology there are two specimens 

 preserved in alcohol ; one of which was collected by Prof. Charles E. 

 Hamlin, at Waterville, Me., the other by myself at Norway, Me. 

 Since these specimens afford additional information concerning the 

 characters and variations of this rare and interesting species, I have 

 prepared descriptions and measurements of each. 



Description of a specimen from Norway, Me., in alcohol (No. 684 

 M. C. Z.). This specimen seems to be a fuUy adult female, and is in a 



