246 On Mammals from Eastern Buenos Ayres, &c. 



the animal is probably now extinct, but the skull is in no way 

 fossilized, and indicates that these animals lived in Peru at a 

 very recent date. 



The species may be called 



hagostomus crassus, sp. n. 



Size larger and form stouter than in L. maximus. Skull 

 stout and heavy, larger in all dimensions than the largest 

 male skull of that species, the anterior frontal region particu- 

 larly broad, convex upwards ; breadth across anteorbiral 

 foramina much exceeding that in L. maximus. Incisive fora- 

 mina minute; palatal foramina large. 



Dimensions of the typical skull: — 



Condylo-basal length 122'5 ; greatest breadth 82*6 ; nasals 

 54 - 5 X 25 ; breadth between outer corners of anteorbital 

 foramina 63 ; least interorbital breadth 36*7 ; front of parietals 

 to back of occipital crest 39*5; palatal foramina 14x4*3; 

 length of upper molar series (crowns) 28. 



H ib. Santa Ana, District of Cuzco, Peru. 



Type. Adult skull without skin. Sex unknown. B.M. 

 no. 97. 10. 3. 16. Collected by J. Kalinowski. 



The material difference in size between this skull and that 

 of the Argentine Viscacha is evident on comparing its 

 measures with those of the type of L. m. tmmollis, the largest 

 male L. maximus skull in the Museum collection. 



13. Cavia rufescens pamparum, Thos. 



cJ. 2090, 2097, 2098, 2099; ? . 2100, 2101. 



Additional material only serves to increase the difficulty and 

 complexity of the problem as to the species and subspecies 

 which should be admitted in the restricted genus Cavia. The 

 present set average rather larger than most O. " rufescens" 

 and approach examples of C. aperea. 



[Lepus europaus, Pall. 

 ? . 2094. 



" Shot in sandhills along coast." 



The European hare is evidently now acclimatized in this 

 region, as Mr. Grant makes no note as to its recent intro- 

 ducti ;n.] 



14. Blasiocerus bezoarticus, Linn. 



cJ. 2091, 2106; ?. 2066. 2092. 



As pointed out by Mr. Lydekker, the name bezoarticus of 



