MR 



DASYPUS SEXC1NCTUS. .".2D 



which I examined at the University Museum at Oxford. Rapp, moreover, in his monu- 

 graph on this species of Anteater, makes uo mention of this nuisde; nor does Cuvier 

 figure it m his plates of the myology of this animal. 



The subclavius is not mentioned in M. Pouchet's monograph upon the (also aon-elavi- 

 culate) M.jubata 1 . 



With regard to the claviculate M. didactylu, Meckel, in his monograph <>n 1 his specie**, 



makes no mention of the muscle in question ; nor docs Cuvier repr sent it in his drawim 

 of this animal's anatomy. 



In a specimen of the Two-toed Sloth (Chohpus didactyku) whirl. I examined at 

 Oxford, I found the subclavius in the form Qf a long and slender fusiform slip. wl,ieh 

 passed from the first rib to be inserted into the scapular third of the clavicle, ami into 

 the acromial process of the scapula. 



Cuvier, in his plates illustrating the myology of Bradyjm tridactylus, gjives a iigun 

 of a muscle which has a slight resemblance to the subclavius, hut attaches 1<> it tin 

 symbol of the pectoralis minor z . 



In the Wombat {Phase olomys wombata) "the subclavius arose by two heads, om- a 

 very delicate one, arising from the lower ribs and passing vertically upwards to end in a 

 fine tendon ; the other, a thick fleshy one, arose from the first rib and was inserted into 

 the outer end of the clavicle, and, by means of fascia covering the supra-spinatus, into 



the whole length of tke spine of the scapula 



In the Porcupine this muscle is of great length, strap-shaped, of nearly uniform breadth. 

 It arises from the costal portion of the first rib, has a slight attachment to the scapular 

 extremity of the clavicle, and is finally inserted, by means of a thin tendon, along the 

 spine of the scapula, becoming continuous, moreover, with fascia which covers tin 

 supraspinous and which is also attached to the anterior edge of the scapular factor of 

 the deltoid. Upon reaching the shoulder the muscle broadens, and continues of tlii- 

 increased breadth until it reaches its insertion over the supraspinal its. 



The termination of this muscle in the above rodent is very fairly represented by Cuvier 



in one of his plates 5 . 



In Gratiolet's monograph upon the Hippopotamus, there is a muscle described under 

 the name « scapulo -sternal," which arises from an aponeurosis covering the muscles of 

 the supraspinous fossa of the scapula, and attached to the border of the coracoid and 

 acromion, and terminates at the manubrium of the sternum. The following footnote is 

 appended to the description of this muscle :-« Ce muscle dont 1 msertion s etend sur k 

 cartilage de la premiere cote, represente probablement le sous-clavier . 



"4 



livraison. rans 



sur 



2 



Anatomie des zAveizehigen Ameisenfresser, Ardor 



Berlin, 1819) 



Ok 



kind permission 



Note Book/ which is kept in the biological departmei 

 recording anatomical and physiological observations of im 



Oxford 



5 



6 



Op 



Anatomie de 1'Hippopotame,' publics par lee soins du Dr. Edmond Alix. Paris, 



1867 : p. 256. 



