256 Prof. J. C. Galton on the Myology 



ilium, and is inserted into tlie upper and outer aspect of tlie 

 trochanter major. The lower border of the muscle is separated 

 from a subjacent muscle (the quadratus femoris?) by the 

 sciatic vessels and nerve. 



I can confirm Meckel's statement (Archiv, p. 49) that no 

 gluteus minimus is present — that is to say, separable from the 

 gluteus medius. All three glutei are, according to Rapp {op. 

 cit. p. 50), present in M. tamandua. 



A large muscle arises from the obturator foramen, and forms 

 its pubic and ischial boundaries, and is inserted into the infe- 

 rior part of the great trochanter. This is probably the obtu- 

 rator externus ; but it closely resembles the muscle figured by 

 Cuvier (pi. 257. fig. 2) as quadratus femoris. 



A muscle, fan-shaped, tapering to its insertion at the under 

 surface of the great trochanter, betwixt the insertion of the 

 gluteus medius and the muscle just described, takes origin 

 from that part of the ischium which lies below (or posterior to) 

 the acetabulum. This muscle, which is most probably the 

 quadratus femoris, though it may possibly be the homologue 

 of either the pyriformis or the gemelli, is covered by the ori- 

 gins of the biceps and semitendinosus ; and the sciatic nerve, 

 moreover, passes over it. Cuvier attaches to it (pi. 257. fig. 2) 

 the symbol of the pyriformis. 



The psoadiliacus has an extensive insertion, the iliac portion 

 being prolonged for some distance on the shaft of the femur. 

 The psoas factor is chiefly inserted into the lesser trochanter. 

 The iliac portion is separated from the psoas parvus, just be- 

 fore the latter becomes tendinous, by a nerve (the external 

 cutaneous?). A few fibres from its external edge are pro- 

 longed on to the rectus femoris, and blend with it. 



The psoas parvus (which is not represented in Cuvier's 

 plates) is inserted by a strong shining tendon into a small and 

 sharp tubercle lying in advance of the root of the slightly 

 convex inner face of the ilium and the junction of the os pubis 

 with this bone. 



As the animal was so " well ribbed home," to use a veteri- 

 nary expression, I could not examine the origins of the psoas 

 parvus and psoadiliacus, a perfect skeleton being required for 

 the museum of the College of Surgeons. 



The pectineus, a well-developed, fan-shaped muscle, arose 

 from the superior edge of the iliac portion of the pubis, covered 

 by the highest fibres of origin of the gracilis, and had a fleshy 

 insertion into the inner side of the femur from below the lesser 

 trochanter to a point just above the inner condyle. 



The adductors seemed to be represented by two muscles. 



1. arose from the rest of the anterior ramus of the os pubis, 



