102 Merrunn — Xcir Mammah from Coxmnel Island. 



(7nint('t(:r/<. — Externally .similar io i/iinifa /a ii-'<ix Alien. i)ul body larger 

 (in 2 ad. ^s averaging HS;!, contrasted with :^(i4 in 2 ad-. -;" nufatitucnuin; 

 in 2 9 s averaging :>.")U contrasted with 827): tail much shorter (in 2 ,^^5 

 a\'eraging :>1 7 contrasted with '5o4 in 2 ad. ,-^ yucdtancuxis: in 2 I'emales 

 averaging 2!)() contrasted with i570): hind feet same size: skidl similar 

 but decidedly larger: roKtrnm rery mucJi broKiJcr: //((■■<ti/K hnxidi'r uiuJ fl<if- 

 ter (especially the anterior 5): posterior roots of zygomata standing out 

 more s(|uarely: zygomatic arm of squamosal larger ami more broadly 

 expanded vertically: ])alate broader: anterior rudinK-nt of auditory 

 capsule (sphenoid bulla) much smaller and more irregular in form. 



Measiiniiniitx. — Type specimen (-^ ad.): total length 70H: tail verle- 

 bne824: iiind foot ol). Average of 2 males from type locality: tt)tal length 

 700; tail vertebr;e :U7: hind foot .")!». An ad. i from type localily: total 

 length (ijd: tail vertebra' 21)!): hiiul foot .■).■). ,\\-erage of 2 females 

 from type locality-: total length ().").">; tail verlel)i';i' 2i)(5: hind foot .").">. 



Tayassu nanus sji. nov. 



Tyjic from (V)zum(>l Island. Yucatan. Xo. lOS.-lK), rf*ad., T^. S. National 

 Museum. Biological Survey ( 'ollecti(»ii. .\pril 7. l!)Ol. E. ^V. Nelson 

 and E. \. (ioldman. Original No. 14.(>()1. 



('hdnu-tcm. — Size small; related to '/////'//^/^/.v but only about two-thirds 

 as lai'ge: color not markedly ditfei'cnl from thai of (n/////^//'/.s- exc<'])( nose 

 and chin which are blacker. 



Color. — I'pperpiirls finely grizzled black and i)ulfy. \\\\\\ dislinci imlfy 

 shoulder-stripe (as in (tiKjnhtlus anil t(ij<icu)\ nose. chin, dorsal stripe 

 (from occiput to tail), ears, and feet, black. The black nose and chin 

 are most conspicuous in the young and are suflicient to distinguish the 

 species from 7'. <ni(jiiliitiix. 



Cranidl clidrdrtirx. —Skull short and broad, especially broad i)Osterior- 

 ly. with abruptly spreading zygomata and \ery large bulhe. Compared 

 with skidls of aiu/it/nfux from Texas and eastern Mexico, the skull is of 

 nearly the same l)readlh. but very much shoi'ter. with much more 

 abruptly spreading zygomata (anteriorly), giving a very different physi- 

 ognomy: relatively larger bullic, and very much smaller molariform 

 leelh. Ihe canines and incisors nearly as large -as \i\ (i/if/iildfiix. 'Vho 

 angle of the jaw is broadly expanded and i-ounded as in n/u/iihiti/x. but 

 difl'ers in ha\ing its ])Osterior mai'gin strongiy inflexetl. In skulls young 

 enough to show the sutures. Ihe nasals are expanded and sipiarely trun- 

 cate posteriorly and rather broadly expanded in the middle. 



MeftHiifoiicnts. — Type specimen (,-{' ad.): lolal lenglli SIO: tail \-erle- 

 brte i]2; hind foot 17S. Average of o males from type localily: total 

 length ^'l'.\: tail \(Miebr;e :{(): hind foot 17."). .\n adidt 9 ffcu lyi)e k)cal- 

 ity: total length r.Si): tail vertebrfe :>(»: hind foot 177. Skull of type: 

 basal lenglh 1 Jti: basilar lengl h of Hensel Ki.S: palatal length 120: occi- 

 pilonasal length bSD: zygomatic bi-eadlli inO; u])i)er molariform series 

 of teeth :yl. 



