Merri(nn — jinicrican Mood Rat>i, 121 



cuities kirire ; l^asisjihenoid spine about the same brtadth as presphenoid. 

 Dcntid characters. — Molars large, very broad anteriorly (ni' nearly I 

 broader than m-), and irhite — the whiteness due in part to the absence of 

 color in the osteodentine, which is dark in other species, and in part to the 

 absence of the usual dark fillings in and about the reentrant angles. M^^ 

 with only 2 salient angles and 1 vertical slit on inner side, the anterior loop 

 being undivided ; crown of m^ a trefoil, the anterior lobe pyriform ; m ^ 

 with antero-internal sulcus obsolete, and middle loop more transverse than 

 in niicropus. 



General reiiin.rks. — Specimens of this new species have been ex- 

 amined from La Parada, San Luis Potosi, Berrizoabal, Zacatecas 

 and Perote, Vera Cruz. The Perote specimens are somewhat 

 smaller and have the jwstpalatal notch narrower and the nasals 

 more acutely ])ointed hehind. 



Neotoma latifrons sp. nov. 



2'//7*t' from QuKRENDARo, MiCHOACAN, Mexico. No. 50,1.35 ,j^ ad. U. S. 

 Nat. Museum, Department of Agriculture Collection. CoUecteil August 8, 

 1892, by E. W. Nelson (Original number 3058). 



Measurement (taken in flesh). — Tape: Total length 350 ; tail vertebnc 

 14y ; hliid foot 42. Ear from anterior base 2(3 (in dry skin). 



General rharacters. — Similar to N. lencodon but smaller, with 

 smaller ears, shorter tail, longer hind feet, and cranial differences. 



Color. — Upper parts ochraceous bull' tinged with fulvous and moderately 

 lined with dark hairs ; the fulvous tinge strongest on sides where it runs 

 forward to cheeks ; under parts and feet white, the white of belly and chin 

 clouded with plumbeous from under fur"; tail indistinctly bicolor, dusky 

 above, becoming soiled whitish beneath. 



Cranial cliaracters. — Skull similar to that of N. Icucodon but difi'ering in 

 having the frontal platform even broader, its sides strongly spreading imme- 

 diately behind interorbital constriction, ami forming a projecting angle be- 

 fore leaving orbital fossa ; skull as a whole shorter and relatively broader ; 

 molars narrower and less crowded ; m i with antero-internal sulcus more 

 pronounced. 



Neotoma fulviventer sp. nov. 



Type from Toluca Valley, Mexico. No. 50,1G5 9 ad. U. S. Nat. 

 Museum, Department of Agriculture Collection. Collected Nov. 5, 1892, by 

 E. W. Nelson (Original number 3744). 



Measarernents (taken in Hesh). — Tij^ie: Total length 350; tail vertebnc 

 IGO; hind foot 34. Ear from anterior base 2G (in dry skin). 



General chara.cters. — Similar to Neototna tenulcaxuhi but larger, 

 darker, and under parts dull fulvous instead of white. Ears 

 and feet small ; tail slender ; texture of pelage fine and soft. 



