ol 





G. 1127. Skeleton of male Ornithorhynchus. Ventral view. The right foie-limb has been separated and 

 turned round so as to bring into view the dorsal surface of the maims : the lower jaw is removed, ace. 

 tors, accessory tarsal bone supporting the spur; ant. pal. for. anterior palatine foramen; all. atlas; ast. 

 astragalus ; ax. axis ; bs.oc. basi-occipital ; bs.sph. basi-sphenoid ; calc. calcaneum ; cbd. cuboid ; cerv. rb, cervical 

 rib ; clav. clavicle ; cond. for. foramen above inner condyle of humerus ; cor. coracoid ; cun. cuneiform of 

 carpus ; dent, position of horny teeth ; ect.cun. ecto-cuneiform ; ent.cun. ento-cuneiform ; ep.cor. epicoracoid ; 

 ep. pb. epipubis ; fb. fibula ; fern, femur ; for. mag. foramen magnum ; glen, glenoid cavity of shoulder- joint 

 and glenoid cavity for mandible ; 1mm. humerus ; il. ilium ; in. cond. inner condyle of humerus ; inf. orb. 

 .for. points to position of infra-orbital foramen ; infr. proc. inferior processes of caudal vertebrae ; int. rbs. 

 intermediate ribs ; isch. ischium ; mag. magnum of carpus ; max. maxilla ; max.for. maxillary foramen ; 

 in i tat. I, first metatarsal ; metal. V, fifth metatarsal ; nas. cart, nasal cartilage; obt. obturator foramen; 

 ol. olccranon ; out. cond. outer condyle of humerus ; pal. palatine ; pat. patella ; post. pal. for. posterior 



1 palatine foramen ; pr.max. premaxilla ; pr. st. presternum ; pter. pterygoid ; pub. pubis ; rad. radius ; scap. 

 scapula ; graph, scaphoid of tarsus ; scaph. lun. scapho-lunar ; ses. sesamoid bones of wrist and ankle ; 

 >. tarsal horny spur ; sq. squamosal ; tib. tibia ; trd. trapezoid ; trm. trapezium ; track, maj. greater 



