50 Proceedings of the Royal Irish Academy, 



In the fore limbs : — 



Trapezius consists in all of three parts, clavicularis ('08*), scapu- 

 laris superior (■07), and scapularis inferior ("05) ; the first of these arises 

 from the occiput in the coatis, and from the spine of the axis as well 

 in the martins, and is inserted into the rudimentary clavicle in N. narica 

 and Martes ; in N. fusca it joins cleidomastoid at its insertion into the 

 clavicle, is united to brachialis anticus, and sends a slip to the humerus ; 

 the superior portion of scapular trapezius arises from the spines of all 

 the cervicals except the atlas and from those of the ten upper dorsals ; 

 it has the usual insertion into the scapular spine, quite separate from 

 the inferior division ; in N. narica it is united at its origin to the clavi- 

 cular trapezius, but separated at its insertion by trachelo-acromial. 

 Trapezius scapularis inferior varies somewhat in position in all. In 

 N. narica it arises from the third, fourth, fifth, and sixth dorsals, and 

 is inserted into the posterior edge of the scapula; in N. fusca the origin 

 is from the six upper dorsals, and the insertion is into the root of the 

 scapular spine ; finally, in Martes it arises from the second, third, 

 fourth, fifth, sixth, and seventh dorsals, and is inserted into the lower 

 border of the posterior half of the scapular spine. 



Sternomastoid ('08) arises from the presternum in all, is inserted 

 into the paroccipital process in N. fusca, and into theparamastoidin the 

 other three ; the two sternomastoids are mesially connivent in the 

 martins. Cleidomastoid ('04) extends from the paroccipital to the 

 clavicle in N. fusca, and from the paramastoid to the same place in N. 

 narica and the martins. Omohyoid was absent in the coatis and ex- 

 ceedingly slender in Martes. Trachelo-acromial ("05) presents nothing 

 of importance. 



Rhomboid ('07) is indivisible in Nasua and arises from the occiput, 

 all the cervicals, and the five upper dorsals ; the insertion is as usual. 

 In Martes the occipital is distinct from the major portion at its origin, 

 which is very far out on the occiput ; the latter part arises from the 

 six lower cervicals and from the two upper dorsals, and is inserted 

 into the scapular spine along with the occipital segment. Teres major 

 (•08) is united at its insertion with the latissimus dorsi in the coatis, 

 but separate from it in Martes. Teres minor ('01) is small but distinct 

 in all, with a long tendon of origin and insertion in JSf. narica ; it is in- 

 serted behind and above scapular deltoid in N. fusca. 



Latissimus dorsi ("23) arises from the dorsal spines (from the sixth 

 to the tenth in N. narica, from the eighth downwards in N. fusca, and 

 from the third downwards in Martes), from the three lower ribs and 

 from the lumbar fascia, and has the usual humeral insertion. Pectoralis 

 minor was absent in all. Pectoralis major ("30) has a presternohumeral 

 slip in all ; the rest of the muscle (bilaminar in N. narica, unilaminar in 

 Martes) arises from the whole length of the sternum, and is inserted into 



* The Numbers refer to the weights in N. narica in decimals of an ounce avoir. 



