206 SYNAPTOMYS. 



308. sphagnicola. (5v«a/A'OT>.f), Preble, Proc. Biol. Soc. Wash., 1899, 



p. 43. 



Type locality. Fabyans, Mt. Washington, New Hampshire. 



Gecgr. Distr. White Mountains, New Hampshire; extent of range 

 unknown. 



Genl. Char. Larger than 5. innidtus, with longer hind feet and 

 tail; skull larger in all its proportions. 



Color. Above sepia brown mixed with black; fur blackish slate 

 at base; side glands indicated with white; under parts grayish white; 

 hairs on cheeks and at base of ears light chestnut; tail above sepia 

 brown, beneath grayish white. 



Measurements. Total length, 132; tail vertebrae, 17; hind 

 foot, 17.5. 



309. wrangeli. {Synaptomys), Merr. , Proc. Biol. Soc. Wash., 1896, 



p. 63. 



TyJ>e locality. Wrangel, Alaska. 



Geogr. Distr. Southwestern Alaska, limits not known. 



Genl. Char. Similar to S. inriuitus, but larger; tail and hind foot 

 longer; skull narrower. 



Color. Above grizzled grayish brown tinged with yellow; under 

 parts whitish plumbeous. Tail brownish above, whitish below, tip 

 darker. 



Measurements. Total length, 122; tail vertebras, 23; hind foot, 19. 



310. dalli. {Synaptomys), Merr., Proc. Biol. Soc, 1896, p. 62. 

 Type locality. Nulato, Alaska. 



Geogr. Distr. Valley of the Yukon, western Alaska. Limits of 

 range unknown. 



Genl. Char. Cranial characters different from S. wrangeli. 



Cranial Characters. Skull similar to that of 6'. wrangeli, but dif- 

 fering as follows: nasals emarginate; interparietal much narrower 

 antero-posteriorly and acute at both ends; brain case broader; inter- 

 orbital constriction broader; zygomatic expansion slightly larger; 

 audital bullae much larger and more fully inflated, with corresponding 

 reduction in breadth of basi-occipital and basi-sphenoid; mandible 

 conspicuously larger, broader and heavier; upper and lower molars 

 conspicuously larger; middle and last lower molars with reentrant 

 angle on outer side decidedly deeper than in S. wrangeli, and thus 

 resembling S. truei; posterior loop of last upper molar as in 

 S. wrangeli. (Merriam.) 



Color. Above raw umber mixed with black, beneath bluish white; 

 feet and tail dusky. 



Measurements. From skeleton. Total length, 115; tail vertebras, 

 22; hind foot, iq. 



