| OCR Text |
Show 1884.] MR. G. E. DOBSON ON CAPROMYS MELANURUS. 243 Gracilis (fig. 3, g) closely resembles the corresponding muscle in Erethizon dorsatus *. As in that species it arises in two distinct parts :-the upper, from the ilio-pectineal ridge and symphysis pubis, divides at a short distance from its origin into two parts ; these unite near their insertion by their flat tendon and are inserted into the tendon of the quadriceps extensor cruris, into the internal edge of the patella, andintothe head and tuberosity ofthe tibia; the lower part (g1) is narrower, but thicker, arising from the symphysis pubis and from the ramus of the pubis and ischium as far as the edge of the semimembranosus muscle, and is inserted into tbe shaft of the tibia above and slightly overlapping the insertion of the semitendinosus, being Fig. 3. Dissection, half natural size, of tbe muscles on the anterior aspect of tbe thigh and leg described in the text. a.c. Anterior crural nerve; /. Internal condyle of femur ; fa. Femoral artery i.l.l. Internal lateral ligament; is. Ramus of pubis and, ischium; pb. Symphysis pubis. connected by a tendinous aponeurosis with the lower edge of the upper part. Adductor longus (fig. 3, a. t) is small, arising from the bony margin of the pelvis under cover of the middle third of the upper part of the gracilis at its origin, and, passing forwards parallel to and partially covered by the pectineus, is inserted into the shaft of the femur directly under the insertion of that muscle. 1 See Mivart, "Anatomy of Erethizon dorsatus;' P. Z. S. 1882, p. 284. |
