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Show 1901.] CHLAMYDOPHORUS TRUNCATUS. 105 where in the neighbourhood of the subfamily Dasypodince-nearest of all probably to the genus Dasypus; although, on account of its peculiar armature, it requires to be placed in a separate subfamily of its own-the Chlamydophorinae. A third subfamily is occupied by the genus Tatusia, distinct in many important features from both Dasypodince and Chlamydophorinae. Such, in brief, is the position assigned to Chlamydophorus by Flower1; but in the settlement of this position there has been in Macalister's well-known monograph2 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 Chlamydophorus will be seen from the foregoing description to be plainly among the Dasypodidce aud very close to Tatusia." 3 Now it is well known that in most of its viscera Chlamydopdiorus shows far more resemblance to Dasypus than to Tatusia, so that, in view of Macalister's conclusions, any Dasypine muscular features possess considerable importance. The occurrence in m y specimen of several features of this kind constitutes the chief excuse for bringing forward 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 Dasypus, Tatusia, and Bradypus that have from time to time come under observation in the Museum work-room of the Royal College of Surgeons 4. MYOLOGY. In addition to the chapter on Myology in Hyrtl's5 classical monograph on Chlamydophorus, 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. V3,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. M U S C L E S or T H E H E A D A N D N E C K . - T h e muscles of the snout and upper lip are well developed, and agree fairly well with Hyrtl's 1 Flower : " On the Mutual Affinities of the Animals composing the Order Edentata." Proc. Zool. Soc. 1882, p. 360. - Macalister: "On the Anatomy of Chlamydophorus truncatus." Trans. K. Irish Acad. xxv. 1895, p. 219. 3 The italics are mine. 4 These specimens were dissected by the Prosector to the College (Mr. William Pearson). 5 Hvrtl: " Chlamydophori truncati... auatomicum examen. Denkschr. k. Akad.'Wiss. Wien, ix. 1855, p. 29. |