1901.] CHLAMYDOPHORUS TRUNCATUS. 105 



where in the neighbourhood of the subfamily Dasi/ijodince— nearest 

 of all probably to the genus Dasypus ; although, on account of 

 its peculiar armature, it requires to be placed in a separate sub- 

 family of its own — the Cldamydopliorince. A third subfamily is 

 occupied by the genus Tatusia, distinct in many important features 

 from both Dasypodince and Chlamydophorina?. Such, in brief, is 

 the position assigned to Ghlamydophorus by Flower^ ; but in the 

 settlement of this position there has been in Macalister's well- 

 known monograph^ a discordant note. This memoir is mainly 

 devoted to an exhaustive description of the myology ; and as the 

 result of a very careful comparison with a large number of other 

 Edentates, the" author concludes that " the position of Chlamydo- 

 pJwrits will be seen from the foregoing description to be plainly 

 among the Basypodidce and veiy dose to Tatusia." ^ Now it is well 

 kno\An that in most of its viscera Ghlamydophorus shows far more 

 resemblance to Dasypus than to Tatusia, so that, in view of Mac- 

 alister's conclusions, any Dasypine muscular features possess 

 considerable importance. The occurrence in my specimen of several 

 features of this kind constitutes the chief excuse for bringing for- 

 ward this paper, while a minor one consists in the want of clear 

 drawings of the myology of this rare animal and the opportunity 

 that is offered of incorporating with the remarks upon its viscera 

 certain hitherto unnoticed details in the visceral anatomy of 

 Dasypun, Tatusia, and Bradypus that have from time to time 

 come under observation in the Museum work-room of the Eoyal 

 College of Surgeons *. 



Myology. 



In addition to the chapter on Myology in Hyrtl's ^ classical 

 monograph on Ghlamydophorus, this subject, as mentioned above, 

 has been dealt with in great detail by Macalister. It will be 

 necessary here to describe only those muscles that differ in some 

 way from these previous descriptions ; in other cases the name 

 only of the muscle will be mentioned to indicate that its presence 

 was observed. 



Panniculus carnosus.- — The only part of this muscle seen was a 

 narrow slip (text-fig. Vd,p.c.) — noticed by both Macalister and Hyrtl 

 — that rises from the head-shield and is inserted into the spine of 

 the scapula superficial to the trapezius. 



Muscles or the Head and Neck. — The muscles of the snout aud 

 upper lip are well developed, and agree fairly well with Hyrtl's 



^ Flower : " On the Mutual Affinities of the Animals composing the Order 

 Edentata." Proe. Zool. Soc. 1882, p. 360. 



- Macalister : " On the Anatomy of Chlamydophoriis tr^mcatus^ Trans. 

 E. Irish Acad. xxv. 1895, p. 219. 



^ The italics are mine. 



* These speciaiens were dissected by the Prosector to the College (Mr. William 

 Pearson). 



5 Hyrtl: " Chlamydophori truncati... anatomicum examen." Denkschr. k. 

 Akad. Wiss. Wien, ix. 1855, p. 29. 



