CHAPTER XX. 



1 HE CORRESPONDENCE BETWEEN THE BONES OF THE ANTE- 

 RIOR AND POSTERIOR EXTREMITY AND THE MODIFICA- 

 TIONS OF THE POSITIONS OF THE LIMBS. 



THAT a general correspondence exists in the plan of con- 

 struction of the anterior and posterior extremity cannot fail 

 to strike the most superficial observer, though to follow out 

 this correspondence into all its details has severely exercised 

 the ingenuity of many an anatomist 



It would he quite beside the character of the present 

 work to give an historical account of the numerous and 

 very various views which have been held upon this sub- 

 ject, 1 but I propose to lay before the student in a condensed 



1 For the bibliography of this question, see Ch. Martins, " Nouvelle 

 c tinparaison cits uieuibres," (Mem. de 1'Academie de Montpellier, 

 1^57); Mivart, "On some Points in the Anatomy of Echidna 

 hystrix," (I. inn. Soc. Trans, xxv. 1866) ; and Rolleston, " On the 

 Homologies of certain Muscles connected with the Shoulder Joint," 

 (ibid. xxvi. 1869). See also Humphry's "Observations in Myology," 

 1872; A. Cioette, " Ueber Entwickelung und Regeneration des Glied- 

 ma-senskclets der Mulche," (Leipzig, 1879) ; H. Strasser, " Entwicke- 

 lung der Extremitseten-knorpel bei Salamandern und Tritonen," (Mor- 

 phul. Jahrb. 1879); A. Sabatier, " Com para ison des Ceintures et des 



