SKELETON OF INSECTIVORA. 



391 



256 



europcBa the scapula, fig. 256, 52, combines ornithic proportions 

 vA{\\ unusual strength ; its length exceeds its extreme breadth 

 by six times : it is trihedral, save at the middle, which is cylindri- 

 cal: the spine is co-elongate, and developes an acromion liga- 

 mentously connected, for freedom of 

 movement, with the clavicle. This 

 bone, ib. 58, is cubical — an unique 

 form in Vertebrata. The humerus, 

 fig. 256, 53, fig. 257, is a sub- 

 quadrate, lamellifbrm bone, with a 

 proximal articulation for the clavicle, 

 58, as well as for the scapula, b, c. 

 The inner tuberosity swells out with 

 the deltoid, d, and pectoral, p, ridges 

 into an enormous convex crest, divi- 

 ded by a short and deep emargina- 

 tion from the inner epicondylar pro- 

 cess, i, the base of which is perforated by the median nerve. 

 The outer tuberosity, t, is produced and unciform ; and a long 

 and deep emargination divides it from the retroverted produc- 

 tion of the radial condyle, o. This condyle offers a convexity 

 to the head of the radius, fig. 257, 54. The olecranon, fig. 

 257, 55, expands transversely at its extremity, and the back part 

 of the ulna is produced into a strong ridge of bone. The 



Boues of fore-limb. Mole. 



257 



fO/»n 



(iraik 



fp!j ,:e] 



Humcriis and its comicctions, Mole: in;igiiifled. 



carpus, fig. 258, consists of the usual eight bones in two rows, 

 viz. ' scaphoid ' s, lunare /, cuneiforme c, pisiforme p ; trapezium t, 

 trapezoides, magnum in, unciforme u : with an ' intermedium,' o, 

 and a second sabrc-shapcd accessory ossicle at the radial side of 

 the carpus. The ungual phalanges are bifid. 



