306 LEMMUS. DICROSTONYX. 



Lemniis Rocherb., Actes Soc. Linn. Bordeaux, xii, 1841, No. 42, 

 p. 216. 



515. Lemmus trimucronatus (Richardson). 



Arvicola trimucronatus Rich., Journ. Parry's 2d Voy., 1825, 



Append., p. 309. 

 Myodes albigularis Wagn., Schreb. Saugth., Suppl., iii, 1843, P- 



602. 

 Lemmus alascensis Merr., Proc. Wash. Acad. Scien., 11, 1900. p. 



26. 

 Lemmus trimucronattis Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 



II, 1901, p. 207, fig. 47. Zool. Ser. Id. Check-L. Mamm. N, 



Amer. Cont. & W. Indies, F. C. M. Pub., vi, 1905, p. 258. 



Zool. Ser. 

 Richardson's Lemming. 



1-33. Adult d^ P. Point Barrow, Alaska. E. A. Mcllhenny. 

 34-48. Adult 9 P. Point Barrow, Alaska. E. A. Mcllhenny. 

 49-50. Juv. Q P. Point Barrow, Alaska. E. A. Mcllhenny. 



516. Lemmus lemmus (Linnaeus). 



Mus lemmus Linn., Syst. Nat., 1, 1766, p 80. Miller, N. Am. 

 Faun., No. 12, 1896, p. 37, figs. 11, 12. 

 European Lemming. 



I.- Adult — P. Sweden. Ward's Nat. Scien. Establ., Rochester, 

 N. Y. 



Genus 144. Dicrostoiiyx. Forkecl-claw Leiiiiniiiss. 



Dicrostonyx Glog., Gem. Hand-d. Hilfsb. Naturg., 1841, pp. xxxr. 



97. Type Mus hudsonius Pallas. 

 Cunictdus Wagl., Nat. Syst. Amph., 1830, p. 121. (nee Brisson, 



nee Meyer.) 

 Myolemmus Pomel, Cat. Meth. Vert. Foss. Bass. Loire, 1854. p. 27. 

 Misothermus Hensel, Zeitsch. Deutsch. Geol. Gesellsch., vii. 1855, 



p. 492. (Part.) 

 Borioikon Poliakoff, Ann. au tome xxxix, Mem. Acad. St. Petersb., 



No. 2, 1881, p. 35. 

 Tylonyx Schulze, Mamm. Europ. Hel. Abhandl. u. Vortrage Ge- 



sammtg. Naturw., Berlin, xiv, 1897, p. 83. 



a. Dicrostonyx luodsoniiis neisoni (Merriam). 



Dicrostonyx neisoni Merr., Proc. Wash. Acad. Scien., 11, 1900, 

 P- 25- 



