98 THE VOYAGE OF H.M.S. CHALLENGER. 



Der zweischwdnzige Daumenheuger, Wiedemann, p. 91. 



Flexor communis pollicis et digiti senindi, Tiedemann, p. 323, No. 6. 



Der gemein&chaftliche Beiiger Jes Daumens und des zweitcn Fingers, Heusinger, p. 196, No. 37. 



Muscle No. 1, Meckel, vol. vi. p. 68. 



Der lange gemeinschaftliche Fingerstrecker, Schoepss, p. 157, No. 37. 



Extensor communis digitorum (?), Eeid, p. 142. 



Extensor digitorum communis longus, Selenka, vol. vi. p. 131, No. 61. 



Uextenseur du pouce et de la premiere phalange du deuxihme doigt, Gervais and Alix, p. 28. 



Attachments. — This muscle is entirely replaced by tendon. It arises from the outer 

 side of the lower end of the humerus, where it is in contact with the radial border of the 

 extensor carpi ulnaris. The tendon is in part continuous with the external lateral liga- 

 ment of the elbow joint. It passes along the outer side of the forearm in the interval 

 between the radius and ulna, and, after crossing the wrist joint is inserted into the outer 

 side of the radial metacaqial bone, as well as into the outer side of the base of the first 

 radial phalanx. 



Relations. — This tendon is concealed by the alar aponeurosis, and rests in the greater 

 part of its course on the tendon which represents the extensor carpi ulnaris. 



Valuations. — In one specimen of Eudyptes chrysocome from Kerguelen, this tendon 

 was composed of two distinct portions, precisely as figured by Schoepss in Spheniscus 

 demersus. This arrangement I failed to meet with in any other species of Penguin. In 

 Eudyptes chrysocome from Kerguelen, this tendon was traced as far as the base of the last 

 radial phalanx into which it was inserted, having previously given a slip to the first 

 radial phalanx. 



3. Flexor digitorum profundus. 



Muscle No. 4, Vicq d'AzjT, 1773, p. 572. 



L'adducteur interne de la deuxikme phalange, Cuvier, vol. i. p. 325. 



Der Strccl(er des zweiten Fingergliedes, "Wiedemann, p. 92. 



Der Strecker der zweiten und dritten Gliedes des zweiten Fingers, Tiedemann, p. 322, No. 3. 



Der vordere Strecker des Daumens und zweiten Gliedes des zweiten Fingers, Heusinger, j). 192. 



No. 33. 

 Leflechisseur prof und, Meckel, vol. vL p. 72, No. 4. 

 Der tiefe lange Fingerbeuger, Schoepss, p. 163, No. 40. 

 Flexor communis (?), Eeid, p. 142. 



Flexor digitorum x>rof und us, Selenka, voL vi. p. 136, No. 67. 

 FlecJiisseur de la dej-niere phalange du deuxieme doigt, Gervais and Alix, p. 29. 



Attachments. — This muscle is represented by a single tendon, which arises from 

 the inner surface of the lower end of the humerus, close to, and in some measure continuous 

 with the internal humero- ulnar ligament. As it extends along the forearm it takes an 

 additional attachment to the contiguous borders of the radius and ulna. After crossins: 

 the inner side of the wrist joint, it passes to be inserted into the inner side of the base of 

 the last radial phalanx. 



