66 
Ileo-caecal valve. 
The segments of the valve are thickened and infiltrated by 
submucosal cysts. The edges of the upper segment are distorted by 
five, the lower segment by two small cysts. The bases of the segments 
and floor of the gut are infiltrated by nine medium cysts. The 
plica sigmoidea, opposite the valve, is invaded by a large cyst in the 
submucosa. 
Colon. (Interior.) Plate I; Plate III, fig. 2. 
Of the 32 cm. of the ascending colon invaded by these tumours, the 
first 13 cm. exhibit the greatest changes. Tumours of all shapes 
and sizes are occupying the walls and floor of the gut, where, 
developing in the submucosa, they have caused prominent bulgings of 
the mucous membrane. Some of the tumours are the size of small 
nuts, measuring 17 mm. by 8 mm. and 9 mm. thick. Many of the 
tumours are oval in shape, others have the character of the leech-like 
cysts seen on the outside of the ileum (cf. Plate IV, figs. 1 and 2). 
Other tumours are bunched together or arranged in long rows, 
infiltrating and distorting the plicae sigmoideae. 
Raised, yellowish patches are seen in some of the cyst walls; the 
mucous membrane surrounding them is ulcerated. Examination shows 
these necrotic areas to be small abscesses. The long tumours are soft 
uctuating, and present the usual characters of the submucous 
cysts. 
The cyst tumours are developed on the sides and floor of the bowel, 
the majors bemg arranged transversely to the axis of the colon; the 
postenor wall appears to be the most infiltrated. In between the 
inelastic ^ ^ tUm ° UrS tbe tissues of the walls appear thinned and 
throthr^r. °f tHe COl ° n H CnL from the ile°-caecal valve, and 
to .. mm ”, Part Sh ° WS the WaI1 to be thickened from 6 mm. 
in thebe' T I, T™ nt the Same hone y com bed appearance observed 
m the caeca! walls (Plate I; Plate V t'i ti , i 
intramuscular and submucosal cystine' en * SUbpent ° nea ' 
closer together Tn n . 7 ’ the c y sts a PP ear to be 
subperitoneal twn h ross -section 24 mm. long, seven cysts (five 
parts of a worn, * UbmUCOSal) were “posed ; each cavity contained 
P rts of a worm. No calcareous deposits were found, but microscopic 
