88 Process of Reproduction of the 



nerves can be discovered, although the minute ramifications of both 

 are visible. 



About the fiftieth day dissection shews that the trunk of the 

 original nerve terminates abruptly at the new growth, and branches 

 of fibrous matter appear to radiate from its extremity, which is 

 considerably swollen and expanded. It appears as it were a new 

 growth. The limb is striated with red vessels, presenting the 

 appearance of a tortuous congeries in the course of the original 

 trunks. The original muscles seem continued by new ones into 

 the new structure, and the new limb is already used in loco- 

 motion. Though the external form of the articulation seems natu- 

 ral, its internal structure cannot be accurately distinguished. 

 Beneath the first articulation, the new growth, with the ex- 

 ception of its coming, consists almost entirely of a homogeneous 

 glutinous substance. 



About sixty days from the period of cicatrization, the first and 

 second joints are perfectly organized, although the new growths of 

 the toes continue soft and glutinous. At this period also all the 

 partial motions of the first and second joints are observed. The 

 old and new bones are united together by callous, resembling the 

 union of a fracture. Even at this period the trunk of the nerve 

 does not extend into the new member, but terminates at its com- 

 mencement. 



The process of organization proceeds in the other joints in suc- 

 cession, but is not completed in all before the hundredth day. 



The process of increase is much slower than that of the two 

 preceding ones. It commences in every one as soon as their 

 organization is finished, but the period in which it is itself com- 

 pleted is so indefinite, depending so much on the season of the 

 year, it is difficult to assign it any particular term. It, however, 

 seldom takes place at any time within less than a year. 



The reproduction of the tail, though appearing to differ from, 

 follows the same process of growth as that of the limbs. As in 

 that case no growth takes place until after cicatrization, and it is 

 preceded by the vascular structure, only of a different form. The 



