nas. 



FIG. 56. Skeleton of 

 male Ornithorhyn- 

 chus. Ventral view. 

 The right fore - limb 

 has been separated 

 and turned round so 

 as to bring into view 

 the dorsal surface of 

 the manus.- The 

 lower jaw is removed. 

 ace. tars. Accessory 

 tarsalbone supporting 

 the spur ; ant.pal.for, 

 anterior palatine fora- 

 men ; asi, astragalus ; 

 ati, atlas ; ax, axis ; 

 bs.oc, basi - occipital ; 

 bs.sph, basi-sphenoid; 

 calc, calcaueum ; cbd, 

 cuboid ; cerv. rb, cer- 

 vical rib ; doc, clavi- 

 cle ; cond.for, fora- 

 men above inner cou- 

 dyle of humerus ; cm; 

 coracoid ; nm, cunei- 

 form of carpus ; dent, 

 horny dental plate ; 

 ect.cun, ecto- 

 cuneiform ; 

 ent.cvn, en- 

 to - cunei- 

 form ; ep.co, 

 epicoracoid ; 

 epist, epi- 

 sternum ; 

 ep.pb, epipubis ; fb, 

 fibula ; fern, femur ; 

 for. mag, foram en mag- 

 num ; glen, glenoid 

 cavity of shoulder- 

 joint ; glen, glenoid 

 cavity for mandible ; 

 hum, hxi m erus ; 

 in.cond, inner con- 

 dyle of humerus ; 

 inf.orb.for, points to 

 position of infra-orbi- 

 tal foramen ; infr.proc, 

 inferior processes of 

 caudal vertebrae ; 

 int.rbs, intermediate 

 ribs ; isch, ischium ; 

 mag, magnum of car- 

 pus ; max, maxilla ; 

 max/or, maxillary 

 foramen ; metat.I, 

 first metatarsal ; 

 metat. V, fifth meta- 

 tarsal; nas.cart, nasal 

 cartilage ; obt, obtu- 

 rator foramen ; ol, 

 olecranon ; out.cond, outer condyle of humerus ; pal, palatine ; pat, patella ; 

 post.pal.for, posterior palatine foramen ; pr.max, premaxilla ; pr.st, presternum ; 

 pter, pterygoid ; pub, pubis ; rod, radius ; scap, scapula ; scaph, scaphoid of tarsus ; 

 scaph.lun, scapho-lunar ; ses, sesamoid bones of wrist and ankle ; sp, tarsal horny spur ; 

 sq, squamosal ; tib, tibia ; trd, trapezoid ; trm, trapezium ; tym.c, tympanic cavity ; 

 uln, ulna ; unc, unciform ; vom, vomer ; x, dumb-bell shaped bone : zyg, zygomatic 

 arch ; /- V, digits 01 mauus ; V, foramen for fifth nerve. (From Parker's Zoology.) 



