110 



MB. li. K. BL-ENE 01>f [Feb. 19, 



clavicular insertion. In this point it apparently agrees with both 

 Dasypus and Tahtsia. 



Like Hvrtl I saw no coraco-hracliialis. Macalister records a 

 small coraco-brachialis brevis. 



ExUmor antehrachii (triceps).— This muscle was of great size 

 and consisted of four very definite heads— two from the scapula 

 (text-fig. 13, e.i&e.ii) and two from the humerus (text-fig. 13, e.iii 

 & e. it). In their arrangement they agree very well with Galton's 

 description of the extensor of Dasypus \ The two scapular heads 

 rise from the superficial surface of the vertebral half of the posterior 

 border of the scapula. The external humeral head {e.iii) rises from 

 the outer and posterior surfaces of the neck of the humerus, aud 

 the inner humeral head {e.i\) from nearly the entire length of the 

 posterior surface of the humerus ; towards its insertion it is easily 

 separable into superficial and deep layers, the deeper part (text- 

 fig. 13, e. t) being apparently the representative of an anconeus 

 quartus. In Macalister's specimen there were three scapular 

 heads and one humeral, of which the third scapular head answers 

 in all save its origin to my external humeral. Hyrll mentions 

 two scapular heads and one humeral. 



The fiexors of the digits are difficult of interpretation. Mac- 

 alister describes a Palmaris longus, which, although easily recogniz- 

 able in my specimen (text-fig. lb,fl.s.), shows in its distribution to 

 the fingers a great resemblance to a flexor sublimis ; it passes over 

 the palmar ossicle as a tendinous expansion, and splits into four 

 faii-ly definite tendons, that are inserted (after dividing to form an 

 ensheathment for the deep tendons) into the proximal phalanges 

 of digits II, III, IT, T. Galton" gives a description of a superficial 

 flexor in Dasypus that tallies very well with this description, and 

 regards it as a combination of Palmaris Jongiis and Flexor sublimis. 

 I am inclined to apply the same interpretation to this someAvhat 

 questionable muscle in Clilamydophorus. 



I was unable to identity Macalister's flexor sublimis, unless it is 

 the humeral head of the flexor profundus described below. 



Flexor jyrofundus digitorum (text-fig. 15, fi.p.d.). — This muscle 

 consists of two vei-y definite parts : — (i.) (? Elexor sublimis, Mac- 

 alister) rises from the inner condyle of the humerus between the 

 flexor carpi radialis and flexor sublimis -f palmaris longus, is attached 

 firmly to the inner (radial) surface of the palmar ossicle, and is finally 

 inserted by a long slender tendon to the terminal phalanx of digit i. 

 (ii.) A muscle of great size rising from the whole flexor surface of 

 both radius and ulna and attached by a very stout tendon to the 

 palmar ossicle; from the distal surface of the ossicle four tendons 

 go to the terminal phalanges of digits ii, iii, it, t. This part, 

 except that it has no tendon for digit i, seems to agree with 

 Macahster's flexor profundus and flexor pollicis. 



Lmnhricals (text-fig. 1-5, 1.). — Four slender muscles, rising from 

 the palmar ossicle between the deep flexor tendons and inserted upon 

 the lateral surfaces of the proximal phalanges with the exception 

 ^ Galton, 1. c. p. .539. ^ Galton, 1. c. p. 545. 



