DICROSTONYX 157 



For external and cranial measurements, see tables at end of 

 volume. 



Remarks. — This is a well-marked form, sharply differentiated 

 from D. rubricatus and D. torquatus by its small size, grey colour 

 and to some extent by its cranial and dental peculiarities. It is 

 possible, as Mr. G. M. Allen has .suggested, that it intergrades 

 with D. ruhricattis richardsoni somewhere to the north of Hudson's 

 Bay, and some of Dr. Rae's specimens, probably those obtained 

 in the neighbourhood of the Gulf of Boothia, seem to lend some 

 sUght support to this suggestion ; but pending definite proof of 

 such intergradation, it is better to accord D. grcenlandicus full 

 specific rank. Outwardly the Greenland Lemming rather closely 

 resembles D. hudsonius, which, however, is distinguished by its 

 larger size, and more importantly by its peculiar cheek-teeth. 



6. Dicrostonyx hudsonius Pallas. 



1779. Mils hudsonius Pallas, Nov. Spec. Quad. Glires Ord., p. 208, 



taf. 26, fig. A, B, C. 

 1808. S/jalax hudsonius Tiedemann, Zoologie, 1, p. 478. 

 1817. Arvicola (Georyrhus) hudsonius Cuvier, Regne Anim., 1, p. 207. 

 1820. Lemmus hudsonius Desmarest, Mammalogie, p. 289. 

 1827. Hipudwus hudsonius Lesson, Man. Mamm., p. 277. 

 1829. Hypydceus hudsonius Fischer, Synopsis Mamm., p. 299. 

 1843. Myodes hudsonius Wagner, Schreber's Saugethiere, Suppl., 3, 



p. 604. 

 1845. Lemnus hudsonius Schinz, Synopsis Mamm., 2, p. 255. 

 1854. Georychus hudsonius Audubon and Bachman, Quad. N. Amer., 



3, p. 81 (part). 

 1872. Myodes torquatus var. hudsonius Forsyth Major, Atti Soc. Ital. 



sci. nat. Milano, 15, p. 122. 

 1874. Cuniculus hudsonius Coues, Proc. Acad. Nat. Sci. Philadelphia, 



p. 196 (part). 

 1877. Cuniculus torquatus Coues, Monogr. N. Amer. Rodentia, 



Muridae, p. 246 (part). 



1896. Dicrostonyx torquatus Miller, N. Amer. Fauna, No. 12, pp. 38-40 

 (part). 



1897. Dicrostonyx hiidsonins Bangs, Proc. Biol. Soc. Washington, 11, 

 p. 237; Miller, "List," 1912, p. 207; G. M. Allen, Bull. Mus. 

 Comp. Zool., Cambridge, 62, 1919, p. 514; Miller, "List," 1924, 

 p. 398. 



Type. — Unknown. 



Type locality. — Labrador; probably the east coast. 



Range. — This species inhabits the barren-ground area of the 

 Labrador Peninsula, northwards from the Straits of Belle Isle 

 on the south-east and from about the Great Whale River (in 

 lat. 55° N.) on the west coast. It is also found on some of the 

 small islands along the eastern side of Hudson's Bay. According 

 to G. M. Allen it is completely isolated from D. rubricatus, the 

 species inhabiting the western shore of Hudson's Bay, by the 

 wooded region around James Bay. 



