469 



Plate VII., Fig. 1. a, Subscapularis accessorius ; b, Circumflex nerve ; c, Subscapu- 

 laris; d, Teres major. 



Fig. 2. a, Infraspinatus secundus ; 5, Capsular ligament of the shoulder ; 

 c, Coraco-brachialis ; d, Biceps. 



Plate VI II., Fig. 1. a, Palmaris longus; b, Palmaris accessorius; e, Flexor Carpi Ul- 

 naris ; d, Pronator Radii teres ; e, Flexor Carpi Radialis. 



„ Fig. 2. a, Pronator teres ; b, Flexor Carpi Radialis ; c, Palmari3 acces- 

 sorius; d, Flexor Carpi Ulnaris. 

 „ Fig. 3. a, Bicipital origin of Pronator Radii teres ; b, b, condyloid origin ; 



c, Supracondyloid humeral origin ; d, Flexor Carpi Radialis con- 

 dyloid origin ; e, Coronoid origin ; /, Flexor Carpi Ulnaris ; 

 g, Supinator longus ; h, Belly of Pronator teres ; Triceps ; 

 j\ Biceps ; k, Brachialis anticus. 



Plate IX., Fig. 1. a, Semitendinosus ; b, Semimembranosus; c, Biceps Flexor Cruris ; 



d, Gastrocnemius ; e, Plantaris ; /, Third or middle head of Gas- 

 trocnemius. 



The Eev. Samtjel Hatjghton, M. D., read a series of communica- 

 tions (in continuation) 



On Animal Mechanics. 

 No. IX. — On the Muscles oe the Maksupials. 



My observations on the muscles of the Marsupials were made on four 

 Kangaroos, an Opossum, and a Phalanger, which died in the Zoological 

 Gardens of Dublin. One of the Kangaroos was the Giant Kangaroo, a 

 female, which had lived for nine years in the Zoological Gardens, 

 and died in January, 1866, after a fortnight's illness, of paraplegia, 

 produced by cold and damp. The other Kangaroos were "Wallabys, two 

 female and one male, which died in 1865-66, of scrofulous disease of 

 the lower jaw, presenting similar symptoms in all, and apparently pro- 

 duced by the damp climate of Dublin, from the pernicious effects of 

 which no care seemed sufficient to protect them. The Opossum (female) 

 was from Virginia, and died in January, 1866, and the Phalanger died 

 in 1864. The stomach of the Opossum contained thirty-four lumbrical 

 worms. 



Paet I.— Kangaroos. 



In describing the muscles of the Kangaroos, I shall refer to them in 

 the following manner 



a, Macropus giganteus (female). 



b, Macropus Vallabiemis (male). 



c, ,, ,, (female), 

 c', ,, (female). 



E. I. A. PROC. VOL. IX. 3 Q 



