168 MEMOIRS OF THE CARNEGIE MUSEUM 
The Mandible. —(P]. XVIII., Figs. 18 and 19.) The inferior incisor has the rela- 
tively short appearance seen in the superior tooth. The external enamel folding ex- 
tends well down on all the cheek-teeth. Premolar z, as in the upper series, is little 
worn, and presents two shallow internal, and one deep external enamel fold. The 
configuration of the crown is naturally more complicated. This would by further 
wear be changed. The first and second molars have about the same relative size as 
the tooth in advance of them, which is also the case in S. fossor. The last molar is 
proportionally somewhat smaller than in the latter species. The mandible as a 
whole is, excepting in size, identical with that of S. fossor. 
MEASUREMENTS. 2 
Greatestilenothyotiskullteepecccstecsde east ccreceressessestoce cede secrete sere essa taeeerena esas aaeanaer 50 mm. 
Greatest width of skull ss 
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Wadthofinterorbitalkconstrictlomsern-aeseeececsesceccscne-t-neceneeteesese eames naartl nearer erento ste seeee re acere 11 f 
Distance MLromuincisOLojpsseeeees ase ease eee ee ese eee eee eee eee eee scene eecey eeteeer cere seer 16 a 
Distance from m® to occipital cond yle..................ecceecee cece ce cec cece eeee eens cece es ceeeeeeeeceree ceeeeeees 19 fe 
Width of palate at p* AN ee eae 
Width of palate at m®... 6 a 
Antero-posterior diameter of tympanic bulla........... 0.02.0... cccec eee eee ee cece este ener eeseneeesteeeeenes Wiley | SS 
Transverse diameter of tympanic bulla, not including constricted tube........-..-...:065 ceeeeceeee 10 ss 
Greatest trausverse diameter of tympanic bulla including constricted tube .........................-. 16 ns 
Transverse diameter of occipital condyle ss 
Vertical diameter of occipital condyle 
Antero-posterior diameter of incisor Bit 4 
Mransverse diam eterorsnclsonsamassssese seca sscereccsc ee csee ened eee acto ene eee e eee eee 3 a 
Antero-posterior diameter of p*.........0......0ceeseeeeeeeeee ees BASE BOE CAREH CODE One Unio sac smenoodonG ssabHa CeOSeED Pa) 7 06 
Transverse diameters ofip swiss tain seat se cee sce saisieatesn saan eiNe aches ec emincee Sees eee e eeee eaeeee DG 
An tero-postenlor diam eter Olea seeeeacesecce ete ee Meee seer eee eee See eee eee ene ce ee eee eee ee ee eee PA yin eee 
Transverse diameter of m4.............. .... Bas oe coo, - Bhi} SY 
Antero-posterior diameter of m2 Px OC 
Mransverse diam etenjol M2 c.csaa-ce mses pedyce ec eeesseeiensecteiseaee ae eecene che ose eee eee eat oeeee eee Bi 
Antero-posterion diam eter Ole meee ceess cece esccnece eee ee a eee eee eee ee eee 2 or 
Mransversediametersofome scree ces secce ore ee ao se rete cleaner ee ee eee Eee eee een Pe. Of 
Mandible. 
Greatestilenathtof mandibletsc.necs-pesssscsveesscsnsseeseceerceaencrecsceeccen tarece cere enema eee eee eeee oY 
Greatest vertical diameter from coronoid process to inferior angle a 
Heightioficoronoids processes: sacs. ocerosor ne es seer e ee oO ee ee eee s 
Vertical diameter of jaw infront of p;, including process on the chin....................s0eeeeeeneeees OS ie tae 
Vertical diameter of jaw at py..........--..0.65 oNdOSPEDBoCHONdEGoRDGEHOOGSSasCOONSS .sG0b CdeHaasHadsqnEONNS daeunoded 10.5 “ 
Distancesfromyincisor aly eolus\toypaeseescoorse Rees see te esseeeteereecoetectaacee ea eeeecenceeerese esters 10 ts 
Wistanceifromim-tojextreme| backs ofiang] esate sees eee encase eee eee eee 14:5. ‘ 
