G L I R E S. 



47 



Hab. — San Francisco, California. Specimen in Nat. Mus. Washington. 



About the size of the preceding, but very different in color. Of this 

 species fine specimens are in the collection of the Expedition, and, 

 like those of the preceding, are as yet the only ones that have found 

 their way to our collections. Of this animal, Mr. Peale remarks : 



" It is not uncommon at the Bay of San Francisco, California, in 

 all moist and grassy situations, but from the form of the tail we infer 

 that it is not aquatic in its habits, like the Arvicola occidental is, to 

 which it is nearly allied." 



That this little species has escaped the attention of late naturalists 

 and collectors, we regard as quite remarkable, especially seeing that 

 the " Bay of San Francisco" has become rather a well-known locality, 

 zoologically and otherwise, since the above was written. Such appears 

 to be the fact, however, and we have, as yet, seen no other specimens 

 than those in the collection of the Expedition. 



3. Arvicola montanus, Peale. 



Arvicola montanus, Peale, Zool. Exp. Exp. Mamm. p. 44 (1848). 



A species under this name is described by Mr. Peale, as above cited, 

 but of which we find no specimens in the collection of the Expedition, 

 nor is there a drawing of it amongst those made by him, nor a citation 

 of a plate in his printed book. We suppose, therefore, that the speci- 

 mens were lost, and can only, under the circumstances, quote the 

 description alluded to ; 



A. forma rotundata, capite magno, aurihus mediocrihus et vellere ]mne 

 vestitis, dentihus flavis, ocidis parvis, iiigris, jjilis subtilihus sericisqiie, 

 in dor so hrunneis nigrisque intermixtis ; infra plumheis cauda i)edi- 

 husque brevi nitente pilo indutis, mystacihus albis nigrisque j mammis 

 ocio, quatiior in abdomine, in pectore totidem. 



" Form rounded ; the head large ; ears moderate and nearly covered 

 with fur ; teeth yellow ; eyes small, black ; hair fine and silky ; 

 that of the back brown and black intermixed; beneath, lead colored ; 

 tail and feet covered with short, glossy hairs ; whiskers white and 

 black ; teats eight in number, four pectoral and four abdominal." 



