334 
Cope.] [Jan. 5,. 
oval; they are straight and regular, and lean backwards. The middle one 
of the five is largest, being six times as long as the small ones, but little 
more than half as long as the large premaxillary or mandibular. The sur- 
face of the maxillary is rugose with small tubercles on its lower half, and 
has shallow grooves for nutritious vessels running downwards and for- 
wards. 
The mandibular rami are short and deep, and have but little mutual 
attachment at the symphysis. They are not incurved at that point, 
and were bound by ligament only. There is no coronoid bone and the 
articular is distinct. It is short, of a rather irregular wedge shape, and 
supports half the cotylus, above which it sends a short acuminate process. 
The angular has a prominent angle, like half an ellipse somewhat con- 
tracted at the base ; below it has a rough prominent muscular insertion. 
The bone extends in a long sword-shaped process, on the inside of the 
ramus to beyond its middle ; externally, it is soon covered by the thin 
truncate edge of the dentary. This element is very large. From the an- 
gular it rises steeply to a coronoid process, which has a slight outwardly 
twisted eminence, and then follows a gently concave line to the symphysis. 
The teeth are as follows: two large, a transverse groove ; three large, 
four very small, nine medium, and two very small; total twenty. These 
teeth have straight cylindric-conic crowns, with enamel without strie or 
facets. The larger are a little compressed. 
Measurements of Jaws and Teeth. 
M. 
Inen giles PROIMASILAY DONG e165 ii 08 ww fois vas ve owas 007 
Depth i ee ee ne Cer re er 093 
Thickness on alveolar margin........... sly Oly Cia as 016 
Length crown of second tooth...... fae Cuenca eS 4 te rahe 046 
Digmoter dO. :AbWASCs yeni sickens svi 6 sie (een b os 6555 oops 014 
Length maxillary bone from premaxillary......... die {iia 270 
Depth fe AU: CONDYOni ner a. es cues Ie os 08 
OM ys At MMOS? Cy. vrai ice ey sie VEN she sees 046 
Length crown third large tooth................ isle sh cre dee 028 
DRAMSTEL COrAo DAO. by ves vhs Ce teens ein O11 
Length crown second small tooth from large.............- 006 
Wpiemister dost baserieuswiiey. Vivi e 8 oe ete es 004 
enSbth Pammusemandwull,.. a6 0 wae riniaie wats 390 
te Cams. Wit serie ie seas Gaia Mn. Oe 
Me Onangular bone anteriorly. 2666666 is es ote oie 08 
Depth at coronoid process :se. ies. ss evel WONT RAL TRG wll? 
ny St LOUM LOUtysije sa wear evi wets ews Ine .08 
eng boro wihiret tO0bis. seuss ei weds aes Gees 038 
Diamoter dos at bAseiinwisnowead «vo saws away ron siie mes O11 
Length crown fourth, 00th. isis swniieiegl ssa wspcae sae vs 055 
Diameter, dOr-at DAB. wey iw essing soy b> An se aeub eS 016 
The opercular bones are thin; the operculum broad, the preoperculum. 
a al 
