526 



B. — Muscles of the Wing. 



Tiercel. 



Falcon. 



Cara. 



Crane 





Oz. 



Oz. 



Oz. 



Oz. 





0-04 . 



. 0-06 . 



. 0-05 . 



— 





0*02 . 



. 0'03 . 



. 0'07 . 



— 





0-02 . 



. 0-02 . 



. 0-02 . 







0-03 . 



. 0-03 . 



. 0-04 . 



— 





0-04 . 



. 0'04 . 



. 0-04 . 







0-05 . 



. O'Oo . 



. 0-04 . 



0-06 





0-73 . 



. 0-76 . 



. 1-03 . 



. 2-00 



8. Pectoralis secundus avium, 



0-08 . 



. O'll . 



. o-io . 



. 0-37 



9. Wingfolder (extensor pliccB \ 0 



0 -03 . 



0 '04 



0 *04 







0-03 . 



. 0'03 . 



. 0-02 . 





11. Deltoideus interims (clavi- \ p 



0-03 . 



. 0-02 . 



. 0-02 . 





12. Deltoideus externvs (scapularis), 0 - 



0'09 . 



. 0-08 . 



. 0-12 . 





13. Supra et infra spinatus, r . . 



0-09 . 



. 0-07 . 



. o-io . 







0-05 . 



. 0-04 . 



. 0-06 . 







0-11 . 



. 0-14 . 



. 0'15 . 





The Eev. Samuel Haeghton, M. D., Fellow of Trinity College, 

 Dublin, read the following paper: — 



Notes ox Animal Mechanics. 



XYHL — On the CoirPAHATiYE Myology oe certain Beminants. 



In the following comparisons of the mnscles of Ruminants I have made 

 the Indian Goat the standard ; the other animals examined being the 

 Virginian Deer, the Nylghau, and Napu Deer of Java. 



A. — Muscles of the Hind Limb. 





Goat. 



Deer. 



Napu 





Oz. 



Oz. 



Oz. 





, 0-11 . 



. 1 25 \ 



. 0'13 



2. Tensor vag. femnris, . 



. 0-42 . 



. 4-25 j ' 



3. Psoas magnus, . . . 



. 0-97 . 



. 7-50 . 



. 0-37 





. 0-26 . 



. 2-50 . 



. 0-05 



[Psoas parvus"], . . . 



. 0-15 . 



. 1'75 . 



. 0-04 







. 2-25 . 



. 0-03 



™ The teres major arises from the spinous processes of the lower dorsal vertebras, and crosses the 

 lower extremity of the scapula, to be inserted by a fiat tendon into its usual place in the humerus. 



n A slip from the upper edge of this muscle joins the wingfolder (extensor plicce alaris Cams). 



0 This muscle takes its origin from the acromion, and is inserted into the wist, acting directly as 

 a folder of the wing. 



p Arises from the tip of the acromion, and is inserted into the top of the humerus, inside the pec- 

 toral ridge. 



•> Origin, from the portion of the scapula adjoining the acromion ; insertion into the outer side of 

 the pectoral ridge of the humerus ; rotates the arm powerfully outwards. 

 f Arise from the lower two-thirds of the outer side of the scapula. 

 a The sartorius in the Goat has a double origin— 



a. From the anterior edge of the pubis, close to the acetabulum. 



b. From the anterior superior crest of the ilium, by fascia. 



