96 [October, 1841. 



AnvicoLAfulva. Glossy Arvicola. 



A. (fulva.) Corpore longo ac tenui ; naso acuto; auriculis et pedibus 

 longis ; velleri tereti ac nitente ; supra fusca ; subtus cano-fusco. 



Glossy Arvicola. Body long and slender, nose sharp, ears and legs 

 long, fur smooth and lustrous ; dark brown above, hoary brown beneath. 



Form. This species presents more distinctive markings than any of our 

 American Arvicola ; its body is less cylindrical, and its nose less obtuse 

 than any of our other species; its ears are prominent, rising two lines 

 above its smooth, compact fur; its lower incisors are very long, and much 

 exposed and considerably curved; tail longer than the head, thinly cov- 

 ered with short hairs ; legs long and slender, giving the whole animal that 

 appearance of lightness and agility observable in the Mouse. 



Colour. Incisors, yellowish-white. The hairs, which are very short, 

 like those on the Pine Mouse of Le Conte, are at the roots on the upper 

 surface, plumbeous, broadly tipped with brown, giving it a bright chest- 

 nut-brown colour ; the hairs, on the legs and toes, are a little lighter ; on 

 the under surface, the colour is cinereous. 



Dimensions 



Length of the head and body, 



Do. tail, 



Height of ear, posteriorly, 

 Length of tarsus, 



The specimen was obtained in one of the South-western States; we be- 

 lieve Illinois. 



Arvicola naauta. Sharp-nosed Arvicola. 



A. (nasuta.) Arvicola Pennsylvanica longior; cauda. capite breviore ; 

 pedibus tenuibus ; calce brevissima; corpore supra ferrugineo-fusco ; 

 subtus ex cinereo et flavo variegato. 



Sharp-nosed Arvicola. Larger than Arvicola Pennsylvanica ; tail 

 shorter than the head; legs small, slender; heel very short ; the body, 

 above, dark, rusty brown ; a soiled yellowish grey beneath. 



The head of this species is rather long, and the nose sharper than the 

 Arvicola in general. The lower incisors are long, and very much curved. 

 The body is less cylindrical than Wilson's Meadow-mouse ; the ears are 

 circular, sparingly hairy within and well covered with fur exteriorly; 

 whiskers shorter than the head ; tail thinly clothed with hair. 



Extremities. Legs covered with short hairs. The fore feet have naked 

 palms ; claws small. The tarsus is more than a third shorter than that 

 of the much-smaller Arvicola Pennsylvanica ; the fur on the back is also 

 shorter. 



Colour. Incisors yellowish-white ; the fur, from the roots to near the 

 tips, is greyish-black; the tips are yellowish-brown and black; giving it 

 a rusty-brown appearance. The legs and tail are light brown ; the chin 

 a soiled white ; the fur on the under surface of the body, is dark-cinereous 

 to the tips, where it is light-coloured. 

 Dimensions 



Length of head and body, 5 inch. 9 lines. 

 Do. head, 1 " 10 " 



Do. tail, 1 2 " 



From beel to point of nail, " 6 " 

 For the sake of convenient comparison, we give the dimensions of the 

 largest of six specimens before us, of 

 Arvicola Pennsylvanica 



Length of head and body, 4 inch. 2 lines. 

 Do. head, 1 " 4 " 



Do. tail, 1 " 6 " 



From heel to point of longest nail, 11 " 

 We are not certain that this species may not have been indicated, al- 



