APPENDIX. 



§ i. 



The first section of the Appendix should, according to pro- 

 mise, have been constituted of an exposition of the views 

 which we have taken with regard to the Cell-theory. Finding, 

 however, that it would be inexpedient to extend this already 

 somewhat voluminous work by the amount of space and num- 

 ber of illustrations which would be necessary for a more com- 

 plete discussion of the subject than has already appeared in 

 the pages of the ' British and Foreign Medico-Chirurgical 

 Review' (October, 1853), we must refer the reader to the 

 article in question. 



We hope, however, in the course of a short time, to treat 

 of the whole subject at length in another place. 



Corpuscula tactus and Pacinian bodies. — In an essay on this 

 subject, contained in the ' Quarterly Journal of Microscopical 

 Science/ for October, 1853, we have endeavoured to show that 

 papillae which contain "corpuscula" may also possess a vascular 

 loop and that there is, at any rate, no inverse relation between 

 nerves and vessels in the papillae, since in the Frog, the termi- 

 nations of the nerves in the fungiform papillae of the tongue, 

 first described by Dr. Waller ( f Phil. Trans./ 1848), take place 

 in obviously vascular papillae. We regard the 'corpusculunr' 

 as no peculiar body, but simply as embryonic connective tissue, 

 differing from that of the rest of the papilla only in the regular 



