820 [Dec. 7, 
Cope.] 
The surface of the cranium is too much obscured by cracks and films of 
matrix to permit a view of the sutures and foramina. 'The face is wide, as 
the posterior part of the maxillary and the malar bone are expanded out- 
wards. I have not yet been able to ascertain the condition of the orbit 
posteriorly. The mandibular ramus is rather slender, 
Measurements. M. 
Length of dental series from posterior base of iiii..... .0248 
id ! DaheS Of SUPOTION NCISOLS Wis wnsimiunilin’ selewie MOU 
id from dill to’ Pm, Ty) Ox clusiven yc vw cows une Oe 
‘\- of premolars on maxillary bone....5.660....+ 0060 
oy ££ ERC Ol EMOTE Gil wich. cioi Valeur EM hee ODO 
Li POUR AVN eotn WEW He Nei Kuh eee ORS 
Width.) i COD ofe nibh Wik vents eeu Wilk oh OOBS 
santeroposterior ......e.eeseeee see ee 20080 
WAVER ONES son's! Vasbewisrnls prervelbiveroote boar OURS 
ANCSVOMGBTCTION 1b ul vis Mivieceus semuie ies nit MORO. 
Diameters m. i 
Diameters m. ii { 
tramsverse...... A RRO MiMite cag oe hi +» «0040 
F snes BLLCOLOPOBUATIOL vs. uisip bie vo bin eelenridie eto WOOO 
Diameters m. iii f°" 
ERE BOTRB casi ollie oi siete skis aaa ab WAN 
i ‘ ‘ og PIMCCLOPOSUCTIOR wis o's, chee oa) pei8 a DOR 
Diameters inferior m. ii Moin 
Tae CARER REEE. viii Vani nn cew eae 
DGpth OLTAMUS MANGUM At Melissa. ns ven em heen QOL 
The skull is about the size of that of the Bassaris astuta. D. Baldwin, 
discoverer, 
The discovery of this type in the Puerco formation is a fact of interest. 
In the shortening of its dental series it is the most specialized genus of 
the epoch, while the forms of its true molars are like those of the simpler 
Creodonta, and more specialized than those of Anaptomorphus, and the 
lemurs generally. In the simplicity of its premolars, however, it main- 
tains the general character of the Puerco fauna, and is more primitive 
than the forms jus’ named. Its nearest ally of the Puerco yet known 
is Ohriacus. 
ANISONCHUS AGAPETILLUS, 8p, Nov. 
This species is founded on parts of six mandibular rami, none of which 
has more than four continuous molars in position, including the last. It is 
not entirely certain that these belong to a species of Andsonchus, because 
the superior molar teeth by which that genus is distinguished from Zaplo- 
conus and Hemithleus, are wanting. The inferior molars have the ante- 
rior inner cusp moderately well developed, as in Anisonchus gillianus. 
The crowns of the true molars consist of two Vs; of which the posterior 
base of the posterior one, is rendered irregular by the presence of a small 
posterior median tubertle. Of the anterior pair of cusps, the external is a 
little the more elevated, and the internal is more elevated than any ot the 
posterior ones. The internal posterior as well as the external posterior 
eccrine nc 
