THE EXTREMITIES OF ORYCTEROPUS CAPENSIS. . r >M 



muscle, the origin of this muscle could not be determined with any accuracy. It wa 

 inserted by a rounded tendon into the Btrongly de\ -loped ilio-pectineal tubercle 1 . 



Tectineus. — This muscle appears to be made up of two distinct portions, which seem 

 to answer to the two layers into which its homologue in Man may, according to llenle*, 

 be differentiated. Cuvier, too 3 , distinctly represents a like arrangement in the animal 

 which is the subject of this description. 



The first or upper portion of the muscle is strap-shaped, and takes origin from the 



strong ilio-pectineal tubercle, beneath that of the gracilis. It is inserted into the " linea 



aspera" of the femur, from below the lowest point of insertion of the iliactu to the 

 femoral insertion of the eemimembrcmoeui. The second or lower port ion is much smaller, 

 and arises from the ilio-pectineal line, between the origin of the first factor of the muscle 

 and that of the adductor longus. It is inserted into the Lowest portion of the posterior 

 intertrochanteric line, on the border of the digital fossa. 



The arrangement of this muscle in Prof. Humphry's specimen appears to have been 

 very different 4 . 



Adductors. — These "adductors" proper appear to be present. They seem to answer 



respectively to the longus and breris of human-anatomy nomenclature, and to the nuisch 

 termed by Henle 5 "minimus," — the upper portion of the great adductor, according to 



Theile and other anatomists. 



a. The homologue of the adductor longvs is a muscle of comparatively small size; it 

 springs from the lower portion of the ilio-pectineal line and from the spine of the pubes, 

 just below or posterior to the second or inferior division of the pectineus, being overlapped 

 by the highest fibres of origin of the gracilis. It passes, uniform in breadth, to be inserted 

 by a thin tendon into the linea aspera of the femur, alongside of the inserted portion of 

 the first division of the pectineus. I could not find any special or distinct representation 



of this muscle in Cuvier's plates. 



j8. This muscle, which I am inclined to regard as homologous with the adductor brevis, 

 is of very great size, and has an extensive origin from the remaining portion of the pubes 

 included between the symphysis and lowest fibres of origin of the adductor longvs, also 

 from the greater part of the descending ramus of this bone, being covered partly by the 

 gracilis, and partly by the semimembranosus. It has a lower point of insertion than 

 any of its fellows, since it terminates on the inferior surface of the femur, diagonally 

 between the third trochanter and a point midway between tin- origin- of the gastrocnemii . 



Cuvier gives a fair representation of this muscle, divided close to its origin and inser- 

 tion 6 , but letters it as the adductor brevis. 



y. The remaining muscle answers, I think, most nearly to that portion of the " great " 

 adductor termed and figured 7 by Henle " adductor minimus." Cuvier, in the figures cited 



round 



half of the bod\ was bent forw 



lim 



i «> 



TJne apophyse pointue sur la base du pubis, et dirigee en avant, e'est-a-dire, vers I ventre." (Cuvier, ■ Osse- 

 mens Fossiles,' he cit. p. 136.) s Muskellehre, p. 268, and fig. 139. 3 Anat. Comp. pi. 256. fig. 4. 



* Loc. cit. p. 310. s Op. cit. p. 270. • Op. cit. pi. 256. figs. 4 and 6. 7 hoc. cit. fig. 140. 



VOL, XXVI. 



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