590 MR. J. C. GALTON ON THE MYOLOGY OF 



the symbol proper to the " carre dela cuisse " ; but I think that the muscle here repr 

 sented must be that which I have regarded as the homologue of the " adductor minimus 

 of Henle, and which Cuvier has figured elsewhere 1 as the "nioyen adducteur." 



According to Meckel 2 , the quadratus femoris is absent in the Anteater. 



Theile 3 notices the occasional absence of this muscle in Man, and further observ* 



that "alors les jumeaux ont plus de volume." With the only instance in which 

 Ifallet found the quadratus femoris deficient in Man (out of 105 subjects examined), 

 there was associated an unusual development of the two gemelll and obturator internus*. 



On reference being made to my paper on Dasypus sewcinctus, it will be seen that 

 while the muscle in question is in this animal exceedingly well developed, the obturator 

 hitermts is absent, and the gemelli very small— the converse of Theile's and Hallet's 

 observations being thus illustrated in a very singular manner. 



Such mutual compensation, however, is by no means always to be found in animals ; 

 for in the Echidna, according to Mr. Mivart 5 , the quadratus femoris is a " delicate 

 muscle," though both obturator interims and gemelli are completely absent. 



Iliopsoas. —The origin of this compound muscle could not with certainty be determined, 

 since much damage had been done to it in the evisceration, as I suppose, of the animal. 

 It is inserted along the inner trochanter of the femur as high up as the head of the bone, 

 and along the inner edge of its shaft for nearly the extent of its upper half. 



Cuvier represents 6 the iliacus muscle as being in two portions near its insertion. 

 Prof. Humphry, however, makes no mention of any such division. The condition of 

 tins portion of the animal which I examined did not allow any verification of this point. 



The former author, too, represents? the psoas as having the lowest insertion along the 

 lemur. JNow, as far as I could determine, this muscle is inserted tendinously into the 

 trochanter alone, while the iliacus is continued fleshy along the inner edge of the shaft 



of the bone 



J, — V. ++IM,. VUq 



Psoas parvus'.-Vov a like reason to that already given in the ease of the preeeding 



3 Encyclopedic Anatomique (Paris, 1843), vol. iii. p. 279. 



i n 9A 5 rn t- _ a 



1 Tab. cit. fig. 4. 2 fy cit ^ 5g6< 



Edin. Med. and Surer. Journ. vol. WW ixa 

 6 Op. cit pi. 255. 



Op. cit. pi. 256. fig. 4. 



XXV 





mo vryczeropits frequently assuming 

 figured is renresenfoH in th<% ****** ~ 



<y 



See Rapp, op. cit. Taf. i., where one of the 



support, and the hand drooping 



formin 



condition, and in Homo as a pathological one %,hS7, 7 """^ " Mar "^"' aS a n,tUral 



in question, seeing that its homolo^et thl T ""* * "^ b ° 8rM "> ""-^ h ? the »"* 



vation as to it, sue in relation to that of the ■ gT^ ^7 ? "^ """ * " " Uv « e " but mk " n0 "^ 



I have found no record, in the works which T hi"' u , 

 assume the attitnde in which it haa been represented hyEa ^ ^ ^^ ° f ' he Aara " Tark bei "* kn0Wn to 



formed 



written 



an Anteater, labelled « Tamandm tetradacL" tA \ l ^^^ ° f ^ pre8erved in the British Mu8eum ' 



atactla («o), which was placed erect upon its hind legs, the tail being curled 



