1008 MESSES. B. C. A. AVINDLE AND F. G. PAESOXS ox [DeC. 19, 



it falls short of it. Amongst the Bradypodidm this is particularly' 

 the case. In Bradypus (4, 5) it reached as high as the fifth rib, 

 and in the latter had four tendinous inscriptions ; in another (6) 

 it was attached to the ribs from the tifth to the eighth, and in a 

 fourth (7) from the third to the seventh. In this last two 

 inscriptions were noted. Amongst the Mi/rmecophacfidce, Tamandua 

 (14) has the attachment extending up to the first rib, and three 

 indistinct intersections were seen. In Ci)clothurus (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 Dasypodidc^ 

 the first rib was the point of attachment in Dasypus (22), Tatusia 

 (26), and Chlamydophortts (27, 28). In the last-named form one 

 tendinous intersection was alone noticed. In 2Ianis (29) the 

 attachment was from the first to the fifth rib, and in Orycferopus 

 (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 intcrnus. — The former of these 

 muscles was in Brudypus (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 MyrmecopJiagidce has the first muscle 

 arising from the fourth rib backward and the second from the 

 last five ribs. Amongst the Dasypodldo', iu 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 high 

 up as the first. In Ohlamydophonts (27) it rose from the lower 

 six ribs. In Manis (29j the external attained the first rib and the 

 internal was attached to the last six. In Orycteroptus (35) the 

 same high attachment of the external oblique is recorded. 



Psoas ntar/nus. — This muscle seems to be always present, t-hough 

 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 Bradypodidc, Brady pus (4, 5) and Cholospus (10). 

 Amongst the My nnecoj^hagidce its presence is noted in Myrmecophaqa 

 (12), Tamandua (14), and Cydothurus (17). In none of these 

 cases is any special association with the iliacus mentioned. 

 Amongst the Dasypodidce it arose from the sides of all the lumbar 

 vertebrae in Dasypus (22, 23). In Tatusia (25) it is described as 

 inseparable from the iiiacus, a condition which we think must also 

 have obtained in Chlamydophorits (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 fiom the 



