172 AFFINITIES OF ^LUEOPUS MELANOLEUCUS. 



EXPLANATION OP THE PLATES. 

 Plate 18. 



Fig. 1. Palatal aspect o{ CTanmxn o{ yElur Opus melanoleuctis ; nat. size. 

 Fig. 2. heit su\e ot palate oi ^lur us ful(/ens; nat. size. 

 Fig. 3. Left side of palate of Procyon cancrivorus ; nat. size. 

 Fig. 4. Palate of Ursus arctus; ^ nat. size. 



2). 4, carnassial ; pal., hinder border of hard palate ; pt., pterygoid ; c/L, glenoid cavity ; 



/, tympanic; eu., eustachian canal; /.o., foramen ovale; /./a, foramen lacerum posterius ; 



cl.f., condylar foramen ; x, Steno's fissure, the aperture of Steno's duct. 



Plate 19. 



Fig. J. Upper surface of right half of cranium of /Ehiropus melanoleucus ; nat. size. 



Fig. 2. Upper surface of right half of cranium of yElurus fulc/eus ; nat. size. 



Fig. 3. Upper surface of right half of cranium of Ursus arctus ; al)out \ nat. size. 



Fig. 4. Palatal aspect of right ramus of mandible of yS^wro/JMs 7He/a//o/e«CM* ; nat. size. 



Fig. 4 a. Outer aspect of same ; about f nat. size. 



Figs. 5, 5 a. Palatal and outer aspects of right ramus of mandible of ^lilurus fulgens ; nat. size. 



Fig. 6. Palatal aspect of right ramus of mandible of P/-oc7/o;( cflHcr/worMS; nat. size. 



Figs. 7,7a. Palatal and outer aspects of right ramus of mandible of Ursus arctus; \ and \ nat. size. 



»«. 1, carnassial, na., nasal; p.o., postorbital process of frontal; cr., coronoid process of 

 mandible ; b.c, base of corouoid process ; c, condyle of do. ; d, angular process of do. ; 

 i.e., internal condylar process. 



Plate 20. 



Figs. 1, 1 a, 1 b. Palmar, preaxial, and distal aspects of right humerus of ^luropus melanoleucus ; 



S nat. size. 

 Figs. 2, 2 a, 2 b. Corresponding aspects of right humerus oi ^^lurus /uh/eu.i ; nat. size. 

 Fig. 3. Distal aspect of right humerus of Procyon cancrivorus ; nat. size. 



Figs. 4, 4 e, 4 b. Palmar, preaxial, and distal aspects of right humerus of Ursus arctus ; § nat. size. 

 Fig. 5. Dorsal aspect of right radius of /Eluropns melanoleucus ; f. uat. size. 

 Fig. 6. Dorsal aspect of right radius of yElurus fulgens ; nat. size. 

 Fig. 7. Dorsal aspect of right radius of Ursus arctus ; "q nat. size. 



Fig. 8. Dorsal aspect of right carpus and metacarpus of JEluropus melanoleucus ; uat. size. 

 Figs. 9, 9 a. Dorsal and ventral aspects of right femur of ^luropus melanoleucus; nat. size. 

 Figs. 10, 10 tt. Corresponding aspects of right femur of Ursus arctus; nat. size. 

 Fig. 11. Dorsal aspect of right tarsus and metatarsus of ^luropus melanoleucus ; uat. size. 

 Fig. 12. A terminal phalangeal of zEluropus melanoleucus. 



d, deltoid ridge ; ewi.c, eutepicoudyle ; e«^/., entepicondylar foramen; //•., trochlea ; «, tuberosity 



of radius ; pi., pisiform; sc.l., scapho-lunar ; ///., trapezium ; ^</., trapezoid ; u., unciform ; 



cu., cuneiform ; r.s., preaxial extra-carpal ; h, head of femur; g.t., great trochanter; l.t., lesser 



trochanter; t.f., trochanteric fossa; cd., condyles of femur; c«., calcanenm ; ar., astragalus ; 



t.s., tibial sesamoid; ent.cu., entocuneiform ; m.cu., mesocuneiform ; ect.cu., ectocuueiform ; 



cb., cuboid ; na., navicular. 



