1884.] 



MR. G. E. DOBSON ON CAPROMYS MELANURUS. 



243 



Gracilis (fig. 3, g) closely resembles the corresponding muscle 

 in Ei-ethison Oorsatus '. As in that sjiecies it arises in two distinct 

 parts : — the tipper, from the ilio-pectineal ridge and symphysis pubis, 

 divides at a short distance from its origin into two parts ; tbese 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, and into the head and tuberosity of the tibia ; the loioer part(5'') 

 is narrower, but thicker, arising from the symphysis pubis and from 

 the ramus of tlie pubis and ischium as far as the edge of the semi- 

 membranosus muscle, and is inserted into the shaft of the tibia above 

 and slightly oveilapping the insertion of the semitendinosus, being 



Fig. 3. 



'^fflfJRfw'' 



Dissection, half uatuval size, of the muscles ou the anterior aspect of the thigh 



and leg described in tlie text. 

 a.c. Anterior crural nerve: f. Internal candyle of femur \ f .a. Femoral arter?/ ; 



i.l.l. Internal lateral Iviament , is. BamwK of ^jmJ/s anel hchiion ; 



pb. Bynifhysis pubis. 



connected by a tendinous aponeurosis with the lower edge of the 

 upper ])art. 



Adductor lonyus (fig. 3, a. I) is small, arising from tbe bony 

 margin of the pelvis under cover of the middle third of the upper 

 part of tlie gracilis at its origin, and, passing forwards parallel to 

 and i)artially covered by the pectineus, is inserted into the shaft of 

 the femur directly under the insertion of that muscle. 



^ See Mivart, ■'Anatomy of Erethieon dorsatii^f," P. Z. S. 1882, p. 284. 



