04 Prof. A. Maciilister on the Myolo(jy 



low this bone. The psoas parvus is present, but small. 

 8ome such continuation of the psoadiliac insertion seems to 

 occur in the Orycterope. 



Sartorius is a large flat muscle, and it arises from the ante- 

 rior superior spine of the ilium and from the outer half of 

 Poupart's ligament ; of tliese origins the latter is the most 

 im])ortant. Its fibres run doAvnwards and inwards to be in- 

 serted into the inner side of the head of the tibia. This muscle 

 includes the slip called by Cuvier " pubio-pretibien," or the 

 rectus intcrnus ; the outer band is inserted into the femur, not 

 the tibia. The origin ascribed to tliis muscle by Meckel (from 

 the external ohlique aponeurosis) will thus be seen to be quite 

 accurate, despite the animadversions of tlie editor of Cuvier's 

 * Jjc^ons orales.' Tliis occurs in tlie Hare and Habbit, as 

 Krause very accurately describes. The sartorius is thus being 

 moved inwards in this animal ; and its displacement is com- 

 pleted in the Armadillo and Orycterope, in which the origin 

 is distinctly internal to its usual site. 



Pectincus muscle is composed of two parts, arising from the 

 pectineal ridge on the os innominatum, and inserted into the 

 femur for its entire length ; the long superficial portion passes 

 internal and nearly parallel to tlie sartorius, while the deeper 

 part seems the true pectineus. This division is noticed by 

 Cuvier, and seems likewise to occur in the Orycterope (Galton, 

 Trans. Linn, 8oc. p. 591). Cirracilis is a continuation inwards of 

 this same muscular stratum, and, arising from the pubic ramus 

 and sym])hysis, passes downwards and inwards to be inserted 

 into the inner condyle of the tibia. 



Bicej)s femoralis is composed of two parts. One, the long 

 head, arises from the tuber ischii and its ascending ramus and 

 descending ramus of the j)ubis ; it overlaps the adductors, and 

 is se])aratcd from the femoral head by the great sciatic nerve. 

 The femoral origin arises from the U])per half of the back of 

 the femur, on its outer side, and soon imites with the long head 

 to be inserted into the head of the fibula. In the Armadillo 

 there is no femoral head, nor in the Orycterope ; but in the 

 'J'aniandua and Two-toed Anteater this muscle has a true fe- 

 moral head. 



Semimenil)ranosus and scmitendinosus arise by a couunon 

 tendon from the tul)er ischii, and continue fused together for a 

 short distance from their origin. They descend the thigh 

 together, and are inserted into the tibia as usual, the semi- 

 membranosus passing to the upper part of the inner condyle 

 and fascia of the leg*. 



* By accident the notes on Ihe adductor niusi-k'S litivc been lost ; so I 

 pvefi'i- leaving them doticieat to lilliny tliu yap from nii'niory. 



