148 PROCEEDINGS OF THE ACADEMY OP [1888. 



The " entopectoralis, div. caudalis" in the cat is penetrated by 

 the thoracic nerve in exactly the same manner as in this Melursus, 

 and would of course be assigned the same origin. 



Coraco-brachialis, as in the black bear, rises from the coracoid 

 process and as it passes over the head of the humerus, divides into a 

 deep belly (coraco-brachialis brevis), which inserts beneath the com- 

 mon tendon of the latissimus dorsi and teres major, and into a more 

 superficial strand, which, opposite the latissimus tendon, further sub- 

 divides into a branch which joins the biceps (short head of biceps) 

 and another which runs to the internal condyle and ridge (coraco- 

 brachialis longus). 



Triceps shows only three distinct heads. The outer humeral head 

 has the form of a triangular prism, with a long sharp angle, which 

 penetrates deeply between the scapular head and the humerus, and 

 ends in a narrow plane truncation, which is closely applied through 

 the whole length of the arm against a similar plane surface on the 

 outer side of the inner humeral head. The two thus form an al- 

 most continuous mass. 



Anconeus rises in a triangle whose apex is four inches above the 

 condyles, and inserts on the entire width of the back of the olecranon 

 and for 2 2 inches on its outer side. It exhibits a splitting into two 

 layers which are separate along its outer border and unite at a1)0ut 

 the axial line of the humerus. 



Epitrochleo-anconens small and narrow. 



Fore-arm. Flexor carpi ulnaris. The ulnar head is four inches 

 long (distance from elbow to wrist being nine inches) and inserts by 

 fascia on the outside of the humeral head. The ulnar nerve is vis- 

 ible between the heads for only about one inch from the elbow and 

 then dips deeply between the humeral head and flexor profundus. 



Flexor profundus rises by five heads, three from the internal con- 

 dyle, one from the radius and one from the ulna. 



Flexor suhlimk rises from the internal condyle and proceeding 

 down the arm as a very broad band, ends in four stout, flat tendons, 

 which supi)ly the four ulnar digits in the usual manner. Rising 

 from its ulnar side is a fusiform accessory muscle, four inches long, 

 which ends in a slender tendon that fuses near the metacarpo-pha- 

 langeal joint with the under surface of the sublimis tendon going to 

 the 5th digit. Another accessory muscle rises from the most ulnar 

 of the three condylar heads of the flexor profundus, 2 2 in. from the 

 wrist; its belly, 1 in. long, divides into two slender tendons, which 



