552 



MR. J. C. GALTON ON DASYPUS SEXCINCTUS. 



straight, lying immediately on the inner side of the psoas magnus, to be inserted into a 

 kind of tubercle ("ilio-pectineal") situated at the junction of the ilium with the pubes, 

 immediately superior to the origin of the pectineus. 

 Pectineus. — Arises from the ilio-pectineal line of the os pubis, immediately posterior to 



the pubi 



of the gracilis. It is a thin, flat, fan-shaped muscle, and is twisted 



such a manner between its origin and insertion that the surface which is superior at 

 the former position becomes inferior at the latter — that edge, moreover, of the muscle 

 which is anterior at origin becoming posterior at insertion, and vice versa. When the 

 thigh is completely abducted, the above appearance departs. The muscle is inserted by 

 a flat tendon, which has a greater breadth than its cord-like representative figured in 



of Cuvier's plates l , into 



hish projection from the inner edge of the femur 



situated immediately below, and slightly posterior to the spring of the " lesser" (internal) 

 trochanter. 



Its insertion lies between that of the adductor and the origin of the vastus internus. 

 In Cuvier's < Legons' it is stated that " le pectine de la taupe, de I' ours, du chien, des 



des fourmilier8 est venti 



femur 



est pas ainsi dans les autres mammifer 



et prolonge son tendon inferieur jusqu'au bas du 



together with the three-toed sloth, " 

 deuxirme portion prolonge egalement 



In some of these latt 



ce muscle est 



separe en deux portions; alors 



s du fern 

 Adducto 



tendon jusqu 



ilieu 



meme jusqu 



This muscle, which is represented by Cuvier, in his plates 3 , as the adductor 



bein 



brevis, is large, almost uniformly broad, and flat, but fleshy. It 



completely covered by that of the gracilis, from the triangular bony s^ formed by 

 the junction of the os pubis and the ischium, which lies between the thvroid foramen 

 and the symphysis pubis, and also from the ascending ramus of the latter bone for the 

 distance of about one inch. It passes across to the femur, broadening slightly towards 

 its termination, and is inserted obliquely into this bone at the lower part of its middle 

 third filling up the interval between the inserted part of the pectineus and the edge of 

 the third trochanter, and having its lowest fibres of insertion continued for a small 

 distance m advance of the above muscle. Its highest fibres of insertion are immediately 



«tl t? P T vY. : mStm €Xtemm WMch MS the fossa deluded ^tween the 

 greater and third trochanter. 



Though the homologies of this 



may nevertheless be 



b 



ded, I think 



muscle cannot be determined with great accuracy, it 



the 



possibly, of both these muscles combined 



presentative of either the adductor 



Meckel, when describing the adductors 



4 



makes no mention of Da&ypus, but states 



that the single adductor in the Anteater whivVZ Z T W ^' 



is derived Lm + w„ u^ ! , ^ ' ^ C ° eXlsts Wlth a well-developed pectineus 



derived from three heads of „ . 



The Ai. moreover, although it has the latter 



muscle extremely well developed has no W «T 7^ !V aiLUOU ^ n ll nas 



j vtuopea, nas no less than four adductors in addition 



Op 



8 Op. cit. pi. 259. figs. 2 & 3, and pi. 260. 



2 Parenthetical remark by Editor, p. 505, vol. i. of 2nd edit. 



A ^\ #_ 



Op. cit p. 596. 



