ix.] OTHER BACTERIA IN CHOLERIA. 171 



and those of the Peyer's glands of the lower part of the ileum 

 and ileocaecal valve, lymph-corpuscles pass (migrate) easily 

 through the surface epithelium, and are discharged on to the 

 free surface. This is the case in the normal condition to a 

 certain extent, and to a greater extent in the pathological 

 state. The mucous corpuscles found in the fluid of the mouth 

 are those that have passed out from the superficial lymphatic 

 tissue of the tonsils. In the Peyer's glands of the ileum 

 one constantly meets these same corpuscles on their way 

 through the epithelium of the surface. 



The second question is more difficult to answer. From 

 the fact that the bacilli are found inside and outside the 

 mucous corpuscles, it might be said that the mucous 

 corpuscles being endowed with amoeboid movement while, 

 and immediately after, passing out of the mucosa, are 

 probably capable of swallowing the bacilli just as lymph- 

 corpuscles are capable of swallowing other granular matter ; 

 but against this might be urged, that the mucous corpuscles, 

 having passed out of the mucosa, probably do not long 

 retain their amoeboid power; proof being afforded by the 

 rapidity with which they swell up and become disintegrated 

 in the watery contents of the intestine. The fact that the 

 better the corpuscles are preserved the more numerous the 

 bacilli, might be an argument either way ; and, besides, 

 several cases have been examined with this view, and only in 

 one were the bacilli found plentiful within the well-preserved 

 corpuscles : they were absent, or almost absent, in the well- 

 preserved corpuscles of other cases, but were present in 

 small numbers in those that had already swollen up or com- 

 menced to disintegrate. There is one other point which 

 must be mentioned in connection with this, it is the fact 

 that, although these bacilli are not endowed with locomotion, 

 it is not impossible that they settle on these corpuscles, 



