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Show ^901.] CHLAMYDOPHORUS TRUNCATUS. 109 origin than in either Macalister's or Hyrtl's specimens. In Macalister's it rose from the last 5 ribs, in Hyrtl's from the last 6, iu mine from the last 9. Upon the left side there was a connection between this muscle and the pectoralis quartus (text-fig. 14). 1 notice that Windle & Parsons l state that in the Dasypodidse the latissimus dorsi frequently rises from all the ribs posterior to the 3rd or 4th, and when this extensive origin occurs there is a close union with the insertion of the pectoralis forming a more or less complete floor to the axilla-in fact a well-developed " Achselbogen." Dorso-epi trochlear is (text-figj. 15, cl.epit.) corresponds with Macalister's description, but is without insertion upon the inner condyle of the humerus. It is attached (as in Dasypus) 2 entirely to the superficial fascia of the forearm. The Splenius capitis was in two parts:-(i) a small triangular muscle rising from the fibrous septum in the dorsal mid-line of the neck and inserted upon the occiput; (ii) a narrow band of muscle, lying in the same plane as part i., with origin from the neural spines of the anterior one or two thoracic vertebrae and inserted upon the skull close above the ear-tube. These two parts agree exactly with the drawing of Dasypus sexcinctus given by Cuvier and Laurillard3. I saw no Rectus thoracis lateralis, a characteristic Edentate muscle. It was not seen by Hyrtl, and in Macalister's specimen it was very small. Possibly I may have overlooked it although fully aware of its importance. The Serratus magnus rose (as in Hyrtl's specimen) from 8 ribs. In Macalister's it took origin from 7. The following trunk-muscles were observed, and agreed with Macalister's description :-Rhomboideus capitis (text-fig. 13, rh.c). Serratus posticus posterior (text-fig. 13, s.p.p.). Trachelo-mastoid. Rectus capitis anticus major. Rectus capitis anticus minor. Longus colli. Rectus abdominis (text-figs. 13 & 14, r.abd.). Levator anguli scapulae. The Serratus posticus anterior-as stated by Macalister- was absent. M U S C L E S O F T H E FORE-LIMB.-The Pectoralis major (text-fig. 14, pect.maj.) had uo clavicular origin. In this point it agrees with the pectoralis of Dasypus but differs from that of Tatusia*. Pectoralis quartus (text-figs. 13 & 14, pect. iv) rose from ribs 5-9 (in Macalister's specimen its origin was restricted to 2 ribs) ; on the right side it was, as described by Macalister, inserted in conjunction with the abdominal part of the pectoralis major, but proximal to it on the left (text-fig. 15). In Tatusia the pectoralis quartus rises from 6 ribs, in Dasypus from 45. The Subclavius (text-fig. 14, sci.), as in Hyrtl's specimen, had no 1 Windle & Parsons, 1. c. p. 322- - Galton : " The Muscles of the Fore and Hind Limbs of Dasypus sexinctus." Trans Linn. Soc. xxvi. 1870, p. 531. 3 Cuvier & Laurillard, Planches de Myologie, pi. 259. fig. 3. 1, + 1. 1 Macalister, 1. c. p. 240. 5 Macalister, 1. e. p. 241. |