﻿DR. J. MURIE ON THE THREE-BANDED ARMADILLO, ©7 



of the bone immediately behind the sacro-sciatic space ; the posterior is implanted rather 

 on a small nodosity of the ischium above the obturator foramen. Neither reaches 

 npwards to the sacrum; and both pretty well conjoined are inserted by a short tendon 

 behind the trochanteric fossa. 



Close to, but further back than, the gemelli is a longish goodly-sized quadratus femoris. 

 This springs from the vertical plate of the ischium in front of its tuberosity, and descends 

 to the third trochanter. The sciatic nerve goes beneath it, but superficial to the gemelli, 

 thus dipping between the two. 



I distinguish, under the temporary name of ischio-femoral, a long, narrow, fleshy band 

 on the same plane as the quadratus femoris, but its origin placed considerably behind it 

 and converging below. It lies and crosses obliquely the surface of the biceps femoris, 

 springs from the ischial tuberosity and partly, by extension of fascial tendon, from the 

 arch of the pelvic shield. Inferiorly it is inserted on the third trochanter behind and 

 somewhat lower than the quadratus femoris. 



None of the authors quoted mentions this extra muscle, unless it be included in their 

 bicipital divisions. I apprehend avine and reptilian characters in it, inasmuch as in some 

 birds there is a somewhat similarly situate muscular strip, which passes from the side of 

 the tail to the middle of the feniur. In the kingfishers I name this " caudo-fcmoral." 

 Mr. Mivart^ describes and figures in the Iguana tnherculaia an accessory muscle, 

 ■designated ilio -peroneal, and another as femoro-caudal. The latter nearly corrcspondR 

 with that of Tolypeutes, though agreeing more with my caudo-fcmoral in the bird. 

 As regards the gemelli and quadratus femoris in Dasypm and Chalmi/dopJiu/uHf these in 

 the main coincide with the condition extant in the three-banded Armadillo. 



According to my reading, the biceps femoris in Tolypeutes has but a single head of 

 origin, viz. from the tuberosity of the ischium and the side of the bone in advance 

 of that process. The anterior moiety of origin is strongly tendinous. The fleshy tibr^'s 

 forming the belly of the muscle broaden out as they descend ; and some proceed nearly to 

 the middle of the fibula. The insertion, however, is an extensive aponeurotic fnscia, 

 which, partly wrapping round the limb behind, stretches from above the outer femoral 

 condyle down to patella, head of tibia, and the fibula as far as the malleolus and even the 

 OS calcis, being attached to the latter by rather a strong tendon. 



Cuvier's drawing, fig. 2, q^ denotes greater fulness of this muscle, but no counter- 

 indication of duality— in this, therefore, agreeing with Huxley's observation and sin- 

 gleness of its origin in the same species, D. 6-cmctus. Galton (Z. c. p. 554), however, look* 

 upon it as made up of two distinct factors. His anterior division is in some respects 

 suggestive of my ischio-femoral slip ; but it includes considerably more, as its main part 

 terminates by fascia heelwards. His second, postero-superior division, with origin from 

 ischial tuberosity, he mentions has connexion above with the gluteus maximus, and below 

 with the gastrocnemius. Chlamydophorus has a biceps essentially, as I have above de- 

 scribed, Hyrtl (/. c. p. 40) even grouping the next pair of muscles along with it en masse. 



The very long semitendinosus springs chiefly by thin fascia from the postero-out^rr 

 surface of the ischium, close to the lower roughening of tlie arch ; and its insertion is about 



» P. Z. S. 1807, pp. 789-794, figs. 15, 16, 17, 18. 



VOL, XXX. 







