Fic. 56.—Skeleton of 
male  Ornithorhyn- 
chus. Ventral view. 
Prmax 
EI Ce: The right fore - limb 
has been separated 
anl palfor and turned round SO 
inforh jor as to bring into view 
MAX the dorsal surface of 
the manus. The 
lower jaw is removed. 
acc.tars, Accessory 
~ tarsal bone supporting 
the spur ; aut.pal.for, 
anterior palatine fora- 
men ; ast, astragalus ; 
Ctl atlas aa acS ys 
bs.oc, basi- occipital , 
bs.sph, basi-sphenoid; 
calc, caleaneum ; chd, 
cuboid 3 cerv. 7b, cer- 
vical rib ; clac, clavi- 
cle; cond.jor, fora- 
men above inner cou- 
dyle of humerus ; ¢07, 
(ae cond. jor coracoid ; cun, cunei- 
z2.cona a form of carpus ; dent, 
'5€8 horny dental plate ; 
cs ect.cwir, ecto- 
: cuneiform 
PLS = Z ent.cun, en- 
: to - cunei- 
x = le form ; ep.co 
3 >’ 
» a 2 epicoracoid ; 
epist, — epi- 
sternum ; 
ep.pb, epipubis ; fb, 
fibula ; fem, femur ; 
JSor.mag,foramenmag- 
num; glen, glenoid a 
cavity of shoulder- 
joint ; glen, glenoid 
cavity for mandible ; 
hum, humerus; 
in.cond, inner con- 
dyle of humerus ; 
inf.orb.for, points to 
position of infra-orbi- 
tal foramen ; 777 7.p70c,- 
\/ G ‘J oe 
ast |4 aS 
cale Ma SS) a \E inferior processes of 
ses ie CL DS PON, ' }-acelars caudal _ vertebrae : 
scaph (Bg cod = “A int.rbs, intermediate 
en£.curn lin cl.cun a ir "oH vn ribs ; ¢sch, ischium ; 
metaltLT lalv. 7 S \\ mag, magnum of car- 
\ \Y Ai i pus ; maz, maxilla ; 
: \\\ CM H//}] max.for, maxillary 
XS f yj foramen ; metat.T, 
rh first metatarsal ; 
Cs metat.V, fifth meta- 
ae tarsal; vas.cart, nasal 
% cartilage ; obt, obtu- 
rator foramen ; ol, 
olecranon ; ovt.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 ; vad, radius ; scap, scapula ; scaph, scaphoid of tarsus ; 
scaph.dun, scapho-lunar ; ses, sesamoid bones of wrist and ankle ; sp, tarsal horny spur ; 
sq, Squamosal ; 7/2, tibia ; trd, trapezoid ; trm, trapezium ; fym.c, tympanic cavity ; 
uln, Wina ; unc, unciform ; vom, vomer ; ~, dumb-bell shaped bone: zyg, zygomatic 
arch ; /-V, digits oY manus ; V, foramen for fifth nerve. (From Parker's Zoology.) 
