| OCR Text |
Show 1008 MESSRS. B. C A. WINDLE AND F. G. PARSONS ON [Dec. 19, it falls short of it. Amongst the Bradypodidce this is particularly the case. In Bradgpus (4, 5) it reached as high as the fifth rib, and in the latter had four tendinous inscriptions ; iu another (6) it was attached to the ribs from the fifth to the eighth, and in a fourth (7) from the third to the seventh. In this last two inscriptions were noted. Amongst the Myrmecophagidce, Tamandua (14) has the attachment extending up to the first rib, and three indistinct intersections were seen. In Cgclothurus (19) the attachment was to the eight upper ribs with three tendinous intersections, whilst in another case (20) only the second to the sixth ribs gave origin to the muscle. Amongst the Dasypodidce the first rib was the point of attachment iu Dasypus (22), Tatusia (26), and Chlamydophorus (27, 28). In the last-named form one tendinous intersection was alone noticed. In Manis (29) the attachment was from the first to the fifth rib, and in Oryeteropus (35) the highest rib was also attained. We are not inclined to place much reliance on the number of intersections, as in small mammals these are often very indistinct. Obliqui abdominis externus et internus.-The former of these muscles was in Bradypus (4) attached to the lower ribs, in (7) to the ribs from the 6th to the 14th, and in (6) to the last six. The condition of the internal oblique is only mentioned in the second of these cases, where it is said to have gone to the last rib. Tamandua (14) amongst the Myrmecophagidce has the first muscle arising from the fourth rib backward and the second from the last five ribs. Amongst the Dasypodidce, in Dasypus (22, 23) the external oblique rises from the ribs from the third to the seventh whilst in another specimen (24) it is stated to have arisen as hio-h up as the first. In Chlamydophorus (27) it rose from the lower six ribs. In Manis (2{)) the external attained the first rib and the internal was attached to the last six. In Oryeteropus (35) the 6ame high attachment of the external oblique is recorded. Psoas magnus.-This muscle seems to be always present, though frequently very closely associated with the iliacus, a condition which we think accounts for the fact that in one or two cases it has been reported as absent. It is large and more or less connected with the iliacus in the Bradypodidce, Bradypus (4, 5) and Cholcepus (10) Amongst the Myrmecophagidce its presence is noted in M);rmecopliaqa (12), Tamandua (14), and Cgclothurus (17). In none of these cases is any special association with the iliacus mentioned Amongst the Dasgpodidce it arose from the sides of all the lumbar vertebrae in Dasgpus (22, 23). In Tatusia (25) it is described as inseparable from the iliacus, a condition which we think must also have obtained in Chlamgdophorus (28), where it is stated not to have been found. In another specimen of the same (27) it is said to have been very small, though separate from the iliacus at its origin where it lay as a thin strip along the side of the ilium. In the account of a third specimen (28 a) no mention is made of this muscle, though the presence of the psoas parvus is alluded to It is therefore probable that here also it was inseparable from the |
