LEMMUS SYNAPTOMYS. 77 



Lemmus yukonensis MiMiiain. Hiolouit-il Survey collection. 



Pn.c. Wasli. \vm\. Sci., II, p. 27, Marcli 14, 1900. 



98849. Skill and skull. Youni;- lulull female, (^harlie Creek, Yukon 

 River, Alaska. Auj-'ust 9, 18!>9. Collected ])y W. II. Ostrood. 

 Original number 7()!>. 



Well-made skin in good coiiditiDn; .«kull perfect. 



Genus SYNAPTOMYS. 



Synaptomys (Mictomys) bullatus Preble. Biological Survey coll. 



Proc. Biol. Soc. Wash., XV, pp. 181-182, August 6, 1902. 



110632. Skin and skull. Adult male. Trout Rock, 25 miles south of 

 Fort Rae, Great Slave Lake, Mackenzie, Canada. July 17, 1901 

 (not August 17, 19(11, as in original description). Collected by 

 E. A. Preble. Original numl^er 1511. 



Well-made skin in good condition; skull perfect. 



Synaptomys cooperi Baird. 



Mammals of North America, p. 558, 1857. 



nil- Skin and skull. Received from AVilliam Cooper, of Hoboken, 

 New J(n-sey. Skin catalogued Februarv^ 26, 1856; skull, June, 1857. 

 Locality unknown. Baird savs, "No locality was assigned, but 

 the animal is undoubtedly North American, probably from the New 

 England States or New York; possibly from Iowa or Minnesota." 

 Dr. C. 11. Merriam (Proc. Biol. Soc. Wash., VII, 1892. p. 177) 

 thinks it not unlikely that the specimen came from southern New 

 Y^ork or northern New Jersey. 



The specimen i- little more than a hall of fur. Head, legs (except one fore- 

 leg detached), and tail are lacking. The skull is in hetter condition. With the 

 exception of the left zygoma the facial parts are complete and perfect, and the 

 frontal, [)arietal, and most of the squamosal of the right side are present. The 

 left half of the mandible has the angular and coronoid processes broken away, 

 while the right half has the condyloid broken off as well. 



Type designated l»y number on page 556 of the original description. 



Synaptomys (Mictomys) dalli Merriam. 



Proc. Biol. Soc. Wash., X, p. 62, March 19, 1896. 



49373. Sk(deton made from alcoholic specimen No. 10957, no other 

 trace of which can now be found. Adult male. Nulato, Alaska. 

 February, 1867. Collected by Dr. W. H. Dall. Catalogued Octo- 

 ber 22, 1872; skeleton April 28, 1891. 



All of the skeleton is present and in good condition; skull not (piitc ])erfect; 

 right malar absent; a piece out of the supraoccipital and both coronoid i)rocesses 

 of manilible more or less broken. 



