524 



Oz. Av. 



The following muscles are found in the palm : — 



31. Short flexors of the outer finger, 5-5 



Oz.Av. 



a, 2-5 



• b, . . 3-0 



a. Origin; from the ligament already described (22) joining the pi- 

 siform and sesamoid of outer finger, from one carpal bone, and 

 from the inner side of the shaft of the metacarpal of the outer 

 finger. 



Inserted into the base of the first phalanx of the outer finger. 



I. Consists of two muscles, arising from the inner half of the meta- 

 carpal of the outer finger, and from the carpal bone of the 

 middle finger, and inserted into the inner side of the first pha- 

 lanx of the outer finger. 



32. Short flexors of the inner finger, 5*0 



These are two in number, and similar to those of the outer finger. 



33. Short flexors of the middle finger, 2*0 



These are two in number. 



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

 Dublin, read the following paper : — 



Notes ok Animal Mechanics. 



XVII. — On the Comparative Myology of certain Bikds. 



In order to compare the muscles of different classes of birds, I dissected 

 two Tiercel Peregrines, a Falcon Peregrine, a Cara Cara Hawk, a De- 

 moiselle Crane, and a Canadian Goose. 



The Cara Cara Hawk (Polybarus, or Falco Bra%iliensis) presents a 

 most striking resemblance to the Peregrine Hawk, and, judging from 

 his muscular anatomy, must be regarded as a Hawk, and not a Vulture. 



A Muscles of the Leg. 



Tiercel. Falcon. Cara. Crane. Goose. 



Oz. Oz. Oz. Oz. Oz. 



1. Sartorius,* . . . 0'05 . . 0'08 . . 0'05 . . 0*11 . . 0*57 



2. Adductores? . . 0*04 . . 0'05 . . 0'09 . . 0'18 . . 0'40 



a The Sartorius takes its origin from the anterior curved edge of the ilium, and is inserted by a 

 broad tendon into the side of the knee joint and tibia. 



t> In the Peregrine and Cara there was only one adductor; in the Crane and Goose there were 

 two, viz.— 



Adductor magnus, 

 Adductor longus, . 



Crane. 

 Oz. 

 0-12 

 0-06 



0-18 



Goose. 

 Oz. 

 0-23 

 0-17 



0^40 



