PLATE XLI. 

 SECTIONS OF GffiCUM SHOWING TRICHOHTRONGYLUS PERGRACILIS. 



FIG. 5. 



FIG. 6. 



FIG. 7. 



FIG. 8. 



FIG. 9. 



FIG. 10. 



FIG. 5. (x5) showing the internal surface of the ca<cutn of a normal Grouse (No. 81) after gentle washing. Several ridges 



are seen, some of which (lie away near the centre of the specimen. The whole surface is covered with small villi. 

 FIG. 6. (x5) showing the internal surface of the ciucum of an apparently healthy wild Grouse (No. 69) after gentle washing. 



The ridges are greatly developed, and the villi larger and more prominent than in the preceding figure. A few worms 



can be een. 

 FlO. 7. (x5) showing the internal surface of the ca-cum of a diseased Grouse (No. 73) after gentle washing. The ridges are 



very broad, and the villi in some places hypertrophied (a). In one situation the villi are so matted together that they 



are almost indistinguishable (li). At this spot a mass of dry material adhered to the ridge. 

 FlG. 8. ( x 5) showing the internal surface of 'the cn'Ciim of a diseased Grouse (No. 12) after gentle washing. The ridges are 



very prominent, but the villi are matted together to such a degree with cementing material that they are almost 



indistinguishable. Some of the ridges are united with the same material (, l>). 



FlG. 9. (xlOO) showing two specimens of T. pfrgrari/is in section in the epithelium covering a villus. 

 Flo. 10. (xlOO) showing a specimen of T. pergracitis in section surrounded by a ring of fibrous tissue. 



Opposite p. 285. ] 



