504 



11. M. supra et infraspinatus, 0*08 oz. 



Arises from the inferior surface of the whole acromion and top of the 

 scapula, and is inserted into the lesser tuberosity. 



12. M. subscapulars, . 0-22 oz. 



Arises from the whole lower and inner surface of the scapula, and is in- 

 serted into the back of the lesser tuberosity. 



13. M. serratus magnus, . . 0*06 oz. 



Arises from the first and second ribs. 



14. M. biceps humeri, 0*15 oz. 



Arises from the tip and posterior border of the coracoid, and is inserted 

 into the tubercle of the radius. 



N". B. — This muscle overlies the coracobrachial. 



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

 Dublin, read the following paper • 



Notes on - Animal Mechanics. 



No. XII. — On the Muscular Anatomy oe theIeish Teeeiee, as com- 



PAEED WITH THAT OF THE AUSTEALIAN DlNGO. 



The anatomy of the Dog is so well known, that I have not attempted 

 in the following account to do more than exhibit the relative weights 

 of the corresponding muscles in four typical specimens, and have added 

 a few explanatory notes respecting facts that I have not found recorded 

 in the writings of other anatomists who have described the muscles of 

 the Dog. 



The first Dog mentioned was a long-legged Irish Terrier, with about 

 one-eighth Bull blood, and was a well-known fighting dog, of light 

 weight. 



The second Dog was very similar, but had not been trained to fight ; 

 he was a good water dog, and frequently caught and ate water hens, 

 hunting on his own account. 



The third Dog was a Dingo, long resident in the Zoological Gardens 

 of Dublin, and his death was occasioned by his own misconduct ; having 

 devoured his four pups for breakfast, he was called to account for his 

 misbehaviour by the mother of the pups, who throttled him on the spot, 

 being persuaded, as some thought, that if she did not anticipate him, he 

 would have proceeded to devour herself next. 



The fourth Dog described was a Greyhound bitch, of excellent run- 

 ning qualities. 



A. — Muscles of the Hind Legs. 



It will be seen from a comparison of all the muscles that the Dingo 

 is closely related to the Irish Terrier, but differs widely from the Grey- 

 hound. 



