904 MESSES. 13. C. A. AYIKJiLE ANT) r. G. PAHSOKS OTf [Dec. ] 9, 



ramus of the jnibes near the acotabuhim, the lower from the ob- 

 tui'ator membrane and horizontal ramus of the pubes. In the 

 Myrvnecophagidcp the muscle is present in Tamandua (14, 15) and 

 Cyclotlmrus (17, 20). In the Dasypodidce it is present in Dasypus 

 (22, 23) and Tatima (25), and was found in Cldamydopliorus (28rt), 

 though not in the other two specimens (27,28). In the Manidce 

 it teuds to fuse -sA'ith the quadratus femoris (29, 32, 33), but in one 

 case (34) it Avas quite distinct. In the Orycteropodidce (35, 36) it is 

 present and normal. 



Quadratus femoris.- — This muscle is present with the usual 

 attachments in B rady pus (\, 4,5, Q), though Humphry failed to 

 find it in his specimen (2). It is also present in Clioloep)us (8, 10). 

 In Tamandua (14) among the Myrmecopjhagidce it is present, but in 

 Cyclothurus (17, 20) it is described as wanting. In the Dasypodidce. 

 it is a strong, distinct, rounded mass in Dasypus (22, 23, 24), which 

 rises from the ischial ramus under cover of the adductor mass, 

 and is inserted into the posterior aspect of the lesser trochanter. 

 In Tatusia (25) it was absent, while in Cldamijdopliorus (27, 28) 

 it was present and triangular in shape. In the Manidce. the fre- 

 quency with which it becomes fused \Aith the obturator externus 

 has already been noticed. In the Orycter'opodidoi it was absent in 

 both Humphry's and Galton's specimens (35, 36). 



Pectineus. — In the Bradypodida', Bradypus is remarkable for 

 the extensive insertion which this muscle possesses, as it is attached 

 to the Avhole length of the shaft of the femur (1, 3). In one speci- 

 men (4) it consists of superficial and deep layers, and in that 

 figured by Cuvier & Laurillard (6) it is divided longitudinally. In 

 Cliolcepus (8, 9, 10) it rises from the pectineal tubercle, and is 

 inserted into the upper half or somewhat less of the femur. In 

 the Ilyrmecophagidce, the muscle is single in MyrmecopJiaga (11, 12) 

 and Cyclothurus (17, 19, 21). In the former animal it ai'ose from 

 the brim of the pelvis opposite the ilio-pectineal eminence, and was 

 inserted into the upper two-thirds of the shaft of the femur. It 

 was entirely supplied by the anterior crural nerve. In Tamandua 

 (14) it was double, and the part which rose superficially was in- 

 serted by a small tendon just above the middle of the femur. The 

 deeper portion was inserted above the last and in the same line 

 with it, reaching as high as the lesser trochanter. In another 

 specimen (15) Eapp describes the muscle as very thick. In the 

 Dasypodidoi the muscle seems usually to be single and small. In 

 the Manidce it is also small but distinct, and is inserted just below 

 the lesser trochanter. In one specimen of Orycteropus (35) Galton 

 found the pectineus double ; one portion was strap-shaped and 

 passed from the ilio-pectineal eminence to the linea aspera, the 

 other part from the same origin extended to the posterior inter- 

 trochanteric line. In Cuvier and Laurillard's specimen it was also 

 double (37), whilst in the animal dissected by Humphry it was 

 single (36). 



Adductor femoris mass. — In Bradypus (1) the adductor longus 

 was distinct and, rising from the ilio-pectineal line, extended to the 



