8o THE SALAMANDER 



Caput (b). M. anconaeus coracoideus (m.ac.c). Fiirbringer (1873); 

 Hoffman (1873-8); Eisler (1895); Rylkoff (1924). 



Coraco-olecranonalis . . . . . Humphry (1872). 



Tete posterieur (82) ...... Perrin (1899). 



Anconaeus caput CO racoideum . .... Osawa (1902). 



This portion of the anconaeus muscle arises by a long, tough tendon 

 from the mesial surface of the bony portion of the coracoid. It is 

 relatively small and slight, and joins the former muscle at about the 

 middle of the humerus. As already mentioned it is separated from 

 the head just described by the extensor nerves and by the insertion 

 of the M. subscapularis. 



Innervation : As caput {a). See above. 



Function : See above. 



Caput {c). M. anconaeus humeralis lateralis (m.a.h.l.). Fiirbringer 

 (1873); Hoffmann (1873-8); Rylkoff (1924). 



Anconaeus caput humerale mediale . . . Osawa (1902). 



With caput ^/ = Tete profonde (83) . . . Perrin (1899). 



Situated on the dorso-lateral surface of the arm the M. anconaeus 

 humeralis lateralis is considerably larger than the two portions of the 

 anconaeus muscle already described. It arises from the proximal 

 third of the antero-lateral surface of the humerus, just posterior to 

 the insertions of the MM. dorso-humeralis and dorsalis scapulae. 

 The direction of its fibres is at first approximately parallel with the 

 humerus, but distally they become oblique in an antero-posterior 

 direction, and the whole muscle passes over to join the other heads 

 on the extensor surface of the arm. It is separated from the head 

 next to be described by the extensor nerves. 



Innervation : By twigs from both extensor nerves. 



Function: See above. 



Caput (d). M. anconaeus humeralis medialis (m.a.h.m.). Fiirbringer 

 (1873); Hoffmann (1873-8); Rylkoff (1924). 



Anconaeus caput humerale laterale . . . Osawa (1902). 



With caput c = Tete profonde (83) . . . Perrin (1899). 



The fourth head of the anconaeus takes its origin from the whole 

 extensor surface of the humerus. It lies mesial to the scapularis and 

 coracoideus portions of the muscle and joins them distally near the 

 common insertion. 



Innervation: From the N. extensorius cranialis. 



Function : See general account of whole muscle. 



