^Fei'i'liiin — lujiir Xen' PcccitrU'x from JL'.rico. 121 



back. ;iii(l coxer the entire nimp, where, when old, they develop swollen 

 whitish nodes or joints .uiviiii:' the rump a ver_y curious appearance. ■••" 



Crduiiil rlKivdctcrs. — Skull larjie, heavy, and massive: upper surface of 

 rostrum and nasals broadly Hattened or only sliuhtly convex: nasals 

 acute anteriorly, reaching;- almost as far forward as premaxillse; zygo- 

 matic ridue rising abruptly to lop of skull and disappearinii- anteriorly 

 over 2d premolar; anterior openiniz' of antorbital foramen situated over 

 posterior root of 1st molar: xidin of rnxfn/m hrniaU}/ fditiui'd (swollen in- 

 stead of exca\ated over premolars, and not divided into upper and lower 

 parts by continuation of zygomatic ridge): jxilate eery broad and flat, ex- 

 panded instead of narrowed between canines and molars, and lacking 

 the sharp ridge which in the niH/u/ufns uroup runs from 1st premolar to 

 inner side of canine: angle of underjaw rouiuled below anteriorly. 



Dental r/taracfcr-s. — Teeth large and heavy, relatively broad anteriorly: 

 2d lower molar with posterior cusp nearly as large and high as anterior 

 (thus (littering widely from its condition '\\\ niifinhitu.-^. in which the 

 tooth is not only very much smaller, but the anterior cusp is high and 

 slender, the posterior nearly obsolete): incisors and canines only slightly 

 larger than in aiif/ulttfus: molariform teeth much larger (relative in- 

 crease in size greatest in 1st and 2d lower ijremolars. 



Tayassu albirostris ringens subsp. nov. 



Ti/jn' from Apazote, near Yohallun, Campeche. Xo. 1U8.2(!». 9 ad., 

 U. S. National Museum, Biological Survey Collection. January 1, 1901. 

 E. W. Nelson and E. A. Goldman. Original No. 14,38:5. 



Charactcrti. — Size large (length nearly 4 feet): ears small: color nearly 

 black: muzzle white: rump aiul median part of back clothed with ex- 

 ceedingly long and flexible flattened bristles, frayed at the ends, those 

 on posterior part of back (when old) with terminal third or half marked 

 by distinct joints or nodes (those on rump averaging three or four on 

 each bristle). Similar in general characters to ((Ibirostrix, from which it 

 differs in the much greater extension of the whitish face markings, the 

 white covering the muzzle completely from snout to midway between 

 nose and eyes, aiul extending backward along sides of undei-ja\\' to be- 

 low ears, and in the presence of an ill d(>fiiieil white band above hoofs of 

 hind feet. 



dolor. — Upperparts black, on close inspection sparingly grizzled with 

 fulvous, especially on sides of neck and shoulders; top of head from 

 occiput to midway between eyes and nose black; muzzle chin and lips 



*Under the microscope the nodes are found to mark points where the 

 horny longit udinal hbers of the outer coat have begun to break and 

 spread. Transverse sections at these points, made by my assistant Dr. 

 S. 1). .Tudd, show that complete disintegration of the interior radiating 

 pith or core has taken place, and indicate that the nodes are coijiHned to 

 the dead terminal parts of the l)rislles. 



