GESOPHAGOSTOMUM STliPHAN'OSTOMUM 



443 



muscularis mucosae of the gut wall. The cysts project internally and 

 externally, and contain inmattire adults, which eventually escape into 

 the lumen of the gut. 



FIG. 320. CEsophagostomuni stephanostonntm var. thomasi : caecum and ascending colon. 

 Subperitoneal cysts are seen on the top right hand, and in the lumen of the gut numerous 

 cysts arranged transversely. The small roundish patches are areas of necrosis in the cyst walls. 

 (After Thomas.) 



CEsophagostomum stephanostomum var. thomasi, 

 Raill. and Henry, 1909. 



Body thick, pointed only at the ends. Buccal capsule much 

 reduced. External crown of thirty-eight leaflets (the " crown " nearest 

 the centre of fig. 319, 5). Male 17 to 22 mm. long by 750 //, thick. 

 Spicule 1*380 to 1*475 mm., slightly curved at the tip. Female, 



