130 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



all on that side of the gut to which the mesentery was 

 attached, and in which the blood-vessels ran; indeed, 

 often they were quite close to these latter, although never 

 actually in their walls. The infection was, in this instance, 

 a comparatively limited one, and the functional activity 

 of the intestine would be in no way interfered with — a 

 very different state of affairs from that described above. 

 There was no enlargement of the folds or pleats (con- 

 sequently no occlusion of the lumen), and on opening, the 

 internal surface (the mucosa) appeared quite normal. 



In size, the patches averaged about 1 mm., while the 

 out-growths were sometimes 1| — 2 mm. in length. Figs. 

 2 and 3 shew some examples drawn natural size. In fig. 

 2 there are three appendages (par) visible on one of the 

 pyloric cseca, and close to the pyloric branch of the mesen- 

 teric artery (art). In fig. 3 some more are seen, also 

 mostly near the attachment of the mesenteric blood- 

 vessels. 



Johnstone's specimen and my own aptly illustrated, 

 respectively, the two chief modi vivendi of the Glugece, viz., 

 (a) cyst-formation, and (b) in the condition of " diffuse 

 infiltration," Thelohan's (7) term for signifying an 

 infected area in which the parasites and the tissue of 

 the host completely intermingle. Fig. 4 represents a 

 section of a portion of the wall of the intestine and an 

 appendage under a very slight magnification, where the 

 darker shaded part (par) shews the diffuse infiltration, 

 and the lighter region is normal uninfected tissue. The 

 out-growth, it will be seen, is practically entirely a para- 

 sitic development, with the exception of a delicate 

 covering of connective tissue and peritoneal epithelium, 

 which is, in places, broken down (ep.). But, here also, at 

 (cy.) an attempt at cyst-formation has taken place, really 

 a pseudo-cyst, since in origin and nature these are very 



