100 THE TRUE CiECAL APEX, OR THE VERMIFORM' APPENDIX. 



the csecum. .The cfecum of the rat resembles the caecum of the 

 mouse in all respects. 



(17) Eodentia — Castor fiber, the European beaver. A longitudinal 

 section through the caecal apex of the European beaver. To illustrate 

 the large amount of lymphoid tissue. 



(IS) 'Ko(\.Qii\Aa,—DoU(:hohis patachonica, the Patagonian cavy. A 

 vertical section through the csecal apex of the Patagonian cavy. To 

 illustrate the serrated appearance presented by the mucosa. 



(19) Carnivora — Hycena striata, the striped hyaena. A longi- 

 tudinal section through the caecal apex of the striped hyaena. To 

 illustrate the large amount of lymphoid tissue at the eaecal apex, and 

 its collection into germ centres. A higher magnification also shows, 



, in this specimen, a number of beautiful macrophages. These cannot 

 be seen in the plate. 



(20) Garnivora — Cam's domesticus, the dog. A transverse section 

 through the ca3cum of a dog. To illustrate the lymphoid tissue 

 collected into well marked and definite areas, somewhat resembling a 

 solitary gland. 



EEFERENCES. 



(1) RuPPER, Armand, "On the Phagocytes of the Alimentary 

 Canal," Q^iart. Jour. Micros. Set., vol. 30, 1890. 



(2) Clado, " Appendix caecal ; anatomic, embryologie, anatomie 

 comparee, bacteriologie uormale et pathologique," Compt. Rendu. Sac. 

 de Biologie, April 29, 1892. 



(3) Kelynack, "The Pathology of the Vermiform Appendix," 1893v 



(4) Fowler, " Observations upon Appendicitis," Annals of Surgery, 

 Part 13, January 1894. 



(5) Treves, " The Anatomy of the Intestinal Canal and Peritoneum 

 in Man," Himterian Lectures, 1885. 



(6) Berry, " The Anatomy of the Caecum," and "The Anatomy of 

 the Vermiform Appendix," both in the Anatomisclier Anzeiger, 1894„ 

 1895. 



