74 [Feb. 17, 
Measurements of skull. M. 
Vertical idinmeter of orbites cok wien cevwieees ea cleas . O84 
ee sf 4. eranium at front, of orbits. +..02018 
# ey ss fs “third premolar. ov sc. 065 
Length of superior molar series..........+.. Aer ore .093 
Ge o fo tH UGHMOlATS pose es ede Paley sea (O49 
‘ 7 ree: SECTIONS ee ces es .0095 
Diameters superior p. m. pe enienone si 
UWtTANSVeEtsO: i. siege de tea OLs 
F ‘ F nieropostenior) . ius uses 018 
Diameters superior m. i §:Ralerot 
Cipansvendegesas ituscive.vs 2015 
‘ 41) WATMONODOSTELION ars a eC pat euiea aad .020 
Diameters m. iii 5° I le 
LAPADAY eYBOr. avidin seri ian ls eter 0165 
anteroposterior... ¢.s.6s..0. .015 
Diameters superior canine { 
{PENS VONSeah ea. Peele es 1009 
The skull of this species exceeds that of the collared peccary, and is 
equal to that of the larger Dicotyles labiatus. 
The lower jaw belonging to Prof. Thomas Condon, to which reference 
has been made, is referred with some doubt to this species. This is be- 
cause it is accompanied by a superior posterior molar, which has not the 
characters of that of the B. pristinus in the lack of the third transverse 
series of tubercles. It is, however, not certain that this tooth belongs to 
the animal represented by the lower jaw. 
In the latter there are two well-developed incisor teeth and an alveolus 
for a much smaller external one on each side. The fourth premolar is 
two-rooted and is separated by diastemata from the canine and from the 
third premolar of about the same length as itself. The other molars are 
in an uninterrupted series. The inferior molars have anterior and posterior 
cingula, but no external or internal ones. On the first and second there 
are no intermediates; on the third they are represented by median swell- 
ings in the bottoms of the transverse valleys. ‘The heel is well developed 
supporting a median tubercle and lateral crenate edges. A narrow ante- 
rior cingulum. These inferior molars have the characters of the specimens 
described by Leidy as typical of the species. 
Measurements. 
M. 
Width between inferior Canimesiicescnws oss sepa ei cess. 1018 
Dlaietersok mas i f anteroposterior ../.01...6.. Wain KOLIO 
\ transverse ...... vasiimmne cade ies 018 
Dihinetete OF me die ANLETOPOSTOTION : 0626 vagoed si sthn. 524081 
? GAVHTIAVELSGit 2. Gowen wabeuuniew puis sOLeD 
Depth of ramus at Mm. sy ).. 4.5 PAWN views eS p20 00D 
BOvHROLABIS TRICH ANUS Cope. 
Thinohyus trichenus Cope. Proceeds. Amer. Philos. Society, 1879, p. 373. 
Established on a nearly complete dentition of both jaws in place, but 
