1868.] Mr. J. Wood on Variations in Human Myology, 499 



ject {op. cit. S. 6). In the opposite arm both the palmaris longus and the 

 substitutory sHp from the subHmis were wanting. In the female (No. 23) 

 a separate digastric muscular belly was provided for the perforatus tendon 

 of the index, while the rest of the muscle was much divided. In No. 31a 

 like digastric muscle gave gave off the perforatus tendons to both the index 

 and little fingers. This was exactly like the instance described in the au- 

 thor's last paper. It has been recorded also by Meckel, and lately by 

 Macalister. It is occasionally found in the Quadrumana. 



19. Flexor profundus digitorum. — In no less than 4 males and 6 females 

 out of the 36 subjects of the present year, and in 19 subjects out of a total 

 of 102, was found the rounded, tapering, muscular slip arising with the 

 condylo-coronoid origin of the sublimis, and joining, either by fleshy fibres 

 or by a long tendon, some part of the jlexor profundus or its tendons. It 

 was observed by Gantzer, and named by him the " accessorius ad fleccorem 

 profundum digitorum.'''' In two males (Nos. 2 and 9) it joined that part 

 of the profundus which supplied the index finger. In No. 9 it came off 

 from the coronoid in common with a like slip to the flexor longus poUicis. 

 In seven subjects it joined the second tendon of the profundus, viz. that to 

 the middle digit ; and in one female (No. 31) it was large, and ended in a 

 long and good-sized tendon, dividing at the wrist into separate tendinous 

 slips to the three inner digits, presenting almost the appearance of an in- 

 termediate common flexor, homologous with that which constitutes the 

 chief bulk of the combined flexor muscles in the Carnivora and other Mam- 

 malia. It was similar in many respects to the arrangement in the Negro 

 before alluded to. The author has found the slip of connexion between 

 the coronoid fibres of the sublimis and the profundus in the arm of the 

 Orang-outang. It is slender, and joins that part of the profundus which be- 

 comes difi^erentiated into a flexor indicis in this animal, as well as in the 

 Gorilla and Chimpanzee. The author has also found the same slip in the Ma- 

 cacus radiatus, arising musculo -tendinous with the sublimis, and uniting 

 just above the wrist with the combined tendons of the flexor profundus and 

 longus pollicis, just before the tendinous slip to the thumb is given off. 

 In Nycticebus tardigradus, or Slow Loris (in which animal the common 

 flexors are still distinct as in Man and the higher Quadrumana), a slip of 

 tendon from the sublimis unites with the profundus above the carpus, and 

 joins also the flexor pollicis (Mivart and Murie, Proc. Zool. Soc. Feb. 1865, 

 p. 24). Meckel also describes this in the Loris. It is also found in 

 Cheiromys, according to Owen, and in Tarsius, as described by Burmeister, 

 showing in these animals a more decided tendency to the more complete 

 amalgamation and substitution found in animals lower in the scale. In the 

 Hedgehog the author has noted its presence in a more decided form, and 

 still more largely developed in the Guineapig, Surmulot, and Rabbit, where 

 it assumes more of the size and importance which it possesses in the Carni- 

 vora, in whom it constitutes the chief bulk of the combined flexors. 



In the left arm of a male (No. 5) a considerable slip, amounting almost to 



VOL. XVI. 2 u 



