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Show 994 MESSRS. B. C. A. WINDLE AND F. G. PARSONS ON [Dec. 19, ramus of the pubes near the acetabulum, the lower from the obturator membrane and horizontal ramus of the pubes. In the Myrmecophagidce the muscle is present in Tamandua (14, 15) and Cyclothurus (17, 20). In the Dasypodidce it is present in Dasypus (22, 23) and Tatusia (25), and was found in Chlamydophorus (28a), though not in the other two specimens (27,28). In the Manidce it tends to fuse with the quadratus femoris (29,32, 33), but in one case (34) it was quite distinct. In the Orycteropodidce (35, 36) it is present and normal. Quadratus femoris.-This muscle is present with the usual attachments in Bradypus (1, 4, 5, 6), though Humphry failed to find it in his specimen (2). It is also present in Cholcepus (8, 10). In Tamandua (14) among the Mgrmecopihagidce it is present, but in Cyclothurus (17, 20) it is described as wanting. In the Dasypodkhe 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 Chlamydophorus (27, 28) it was present and triangular in shape. In the Manidce the frequency with which it becomes fused with the obturator externus has already been noticed. In the Orycteropodidce it was absent in both Humphry's and Galton's specimens (35, 36). Pectineus.-In the Bradypodidce, Bradypus is remarkable for the extensive insertion which this muscle possesses, as it is attached to the whole length of the shaft of the femur (1, 3). In one specimen (4) it consists of superficial and deep layers, and in that figured by Cuvier & Laurillard (6) it is divided longitudinally. In Cholcepus (8,9,10) it rises from the pectineal tubercle, and is inserted into the upper half or somewhat less of the femur. In the Myrmecophagidce, the muscle is single in Mgrmecophaga (11, 12) and Cyclothurus (17, 19, 21). In the former animal it arose 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 inserted 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) Rapp describes the muscle as very thick. In the Dasypodidce 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. Iu one specimen of Oryeteropus (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 intertrochanteric 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 |
