SYNOPSIS OF THE TEUTEHHATE FAUXA OF THE PUEItCO SEHIES. 321 



Inferior molars, .017 ; Ihe first small, the last large, .00G5 ; depth of ramus at m. i, .013 M. jUhoUanus. 



Inferior molars, .011 ; fifth lobe small, heel with one cusp ; depth ramus at m. ii, .007 M. aeolytus. 



II. Inferior true molars wilh anterior inner tubercle submcdian and depressed ^ Goniaeodon). 



Inferior true molar i or ii, .01 1 ; fifth cusp elevated, inner edge of heel crenate M. heilprinianut. 



Inferior true molars, .0115 ; anterior paired cusps much elevated ; last molar elongate, .007 il. asaurgens. 



Inferior true molars, .023 ; last inferior and superior molars reduced, the inferior, .007 M. levisaniu. 



Inferior true molars, .040; list molar large,. estimated, .013 ; ramus deep ; fifth cusp low, lieel not crenate inside 



J/, rusticus. 



III. Inferior true molars (except first) without anterior inner fifth tubercle (JUioclainus). 

 A Premolars of smaller diameters than true molars. 



a Heels of inferior molars supporting cusps. 



,9/9 Superior molars subtriangular, rounded at inner angle. 

 Superior true molars wide, .017, wilh small tubercle between e.vternal cusps, and strong posterior internal ciugulnm ; 



inferior molars, .023 ; depth of ramus at m. i, .012 3t. suhtrigonvs. 



Superior true molars, .019 ; external cusps close together and without intermediate cusp .)/. cuspidatus. 



Superior true molars wide, .021 ; inferior molars, .025 ; premolars, .035 ; depth of ramus at ni. i, .015, M. protogonioides. 



Inferior true molars, .028, the anterior with a strong anterior fifth cusp M. flovcriatius. 



aa Heels of inferior molars bounded by a curved crest (anterior inferior true molar with median anterior 

 fifth cusp). 



Enamel wrinkled ; length of ramus, .110 ; depth at m. i, .020 ; true molars, .035 ; premolars, .035 JU. corrugatus. 



Enamel roughish ; length of ramus, .160; depth do. at m. i, .034; true molars, .038; premolars, .041 M. ferox. 



A A Superior or inferior premolars of equal or greater transverse diameter than the true molars. 

 a Heels of inferior molars supporting cusps. 

 Last superior premolar with large internal cusp ; superior molars, .013 ; inferior molars, .010 ; premolars, .019 ; depth 



ramus at m. i, .010 ; last molar large M. opiathaeua. 



aa Heels of inerior molars supporting a curved crest from an external cusp (last molars small ; no fifth 

 cusp on inferior m. i). 

 Cusps obtuse, premolars swollen ; superior molars, .018 ; premolars, .039 ; superior ji. m. iii and iv, wilh internal 



cusps ; depth of ramus at m. i, .012 if. turgidvt. 



Like last but smaller, and internal cusp wanting on superior p. m. iii, and rudiniental on p. m. iv ; superior molars, 



.015 ; premolars, .022 M. siiulianus. 



Much smaller; inferior molars, .0125 ; depth of ramus at m. i, .007 ; exterior cingulum of superior molars strong ; 



premolars in both jaws large ; heel of lower molars with high edge M. turgidiinculua. 



Still smaller ; superior molars, .008, with strong external cingulum ; premolars not enlarged ; inferior m. iii not much 



smaller than m. ii M. aeolytui. 



Small ; superior molars, .010 ; without external cingulum ; intermediate tubercles very indistinct ; inferior ni. iii much 

 smaller than m. ii ; premolars small M. minimus. 



JIlOCL.KSnS BATnTC.SATIIUS Sp. nOV. 



Established on a nearly entire left mandibular ramus which supports the true 

 molar teeth and the second premolar. The species is distinj^uishcd at first sight by 

 the relatively large size of the i-amus, as comi)ared with the dimensions of the true 

 molais. The latter do not exceed in size those of the M. ferox, but the jaw is that 

 of an animal as large as the M. conidens. 



The ramus is of compressed form, and is rather thin posteriorly. It is deepest 

 below the first true molar. Symphyseal sutuic very coarse. Coronoid process large. 



