BY W. J. S. McKAY. 333 



micklle of tlie forearm it becomes intimately united with the sur- 

 face of the flexor carpi uhiaris. The anterior muscle is wider, but 

 shorter than the preceding ; it arises from the spines of the first 

 eleven dorsal vertebrte, and also somewhat from the fascia luni- 

 borum. It is inserted into the inner condyle of the humerus, in 

 union with what appears to be the dorso-epitrochlear." 



Dorso-epitrochlear (?) of MivarL. — " There is a long narrow 

 muscle arising from the posterior extremity of the vertebral 

 margin of the scapula, and from the posterior and outer side of 

 the tendon of origin of the teres major. It passes downwards and 

 becomes intimately connected with the second part of the latissi- 

 mus dorsi, in common with which it is inserted, by a very strong 

 tendoD, into the ioternal condyle of the humerus. This muscle 

 appears to me to represent the dorso-epitrochlear. Its origin is 

 very similar to that of the last-named muscle in the Hyrax, 

 though its insertion is certainly diiferent, and it might perhaps be 

 regarded as a separate portion of the teres major." 



Ornithorhynchus. 



Owen says — " The latissimus dorsi, a very long and broad 

 muscle, arises from the spines of all the dorsal and lumbar 

 vertebrte, and from the eleven posterior ribs ; it is inserted by a 

 broad and strong tendon into the distal half of the ulnar margin 

 of the humerus. At its anterior part this muscle may be separated 

 into a superficial .tnd deep stratum." 



Leche says— " Bei Ornithorhynclius entspringt er dagegen von 

 alien Brust- und Lendenwirbeln sowie von dea 8 oder 11 hinteru 

 Rippen; inserirt an der Mitte desulnaren Humerus-Randes ; zer- 

 fjiUt im Insertionstheile in eine, oberflachliche und eiue tiefere 

 Schicht (Meckel). Eine etwas abweichende Schilderung giebt 

 Coues." 



CoUES says — " Latissimus dorsi — notable for its extensive 

 costal, and correspondingly slight spinal origin. It arises by 

 ai)oneurosis for about six dorsal vertebrse (4th-9th), beginning 

 Ht a point just opposite the shoulder, to which therefore the upper 

 border passes directly transverse ; most of this spinal portion is 

 23 



