CONTRIBUTIONS TO THE MYOLOGY OF TACHYGLOSSA 

 HYSTRIX, ECHIDNA HYSTRIX (AuCT.). 



BY J. W. FEWKES, PH.D. 



I HAVE enjoyed the opportunity of dissecting a single 

 specimen of that rare and highly interesting mammal, 

 Tachyglossa hystrix. The specimen was given to me 

 by the Museum of Comparative Zoology at Cambridge. 

 Especial attention has been paid in this dissection to the 

 myology of the head and neck, as it is my impression that 

 the descriptions of the muscles of these parts by others 

 are more or less unsatisfactory. I add a more detailed ac- 

 count than has yet appeared of the more important deeper 

 layers of that complex cutaneous muscle, the Panniculus 

 carnosus. A description of these muscles is all the more 

 interesting, considering that they play such an important 

 part in the movements of the fore-leg. 



To this is added a new interpretation of certain muscles 

 of the fore and hind limbs, and a description of muscles 

 of the tail, and digits of the fore and hind legs, which 

 appear to have been thus far unnoticed. 



MUSCLES OF THE HEAD. 



The descriptions which we have of the muscles of the 

 head of this abnormal animal are very meagre and few 

 in number. The work of Duvernoy, "De la langue con- 

 sideree, comme organe de prehension, &c." (Mem. de la 

 Societe" d'Hist. Nat. de Strasbourg, 1830), seems to be 

 the first attempt to figure and describe the muscles of the 



(ill) 



