ZOOLOr;Y AND BOTANY, MICROSCOPY, ETC. 



327 



extendino- from in front of the pharynx to the posterior Hmits of the 

 testes ; cirrus sac large ; testes large, fillino- most of the width of the 

 body. Affinities are with the genus Braelujccelium. J. A. T. 



New Cercaria from North America.— AV. AY. Cort {Jovrn. Para- 

 sitology, I'Jls, 5, .S6-91, 1 pL, 1 fig.). In Planorhis compamdatus 



Cercarixum mutahile. Scale equals 0-1 mm. 



A, side view ; B, ventral view ; o.s., oral sucker ; ph., pharynx ; ac, aceta- 

 bulum; ov., ovary ; ^., testes ; 6., excretory bladder ; a?s., oesophagus; 

 exp., excretory pore. 



smithii Baker, from Douglas Lake, Michigan, there was found a new 

 Cercaria, provisionally named Cenarisewn mutahile. The redise filled 

 the liver of the snail. ' The adult is not known, but the structure of the 

 Cercaria suggests the sub-family AUocreadiinae. The Cercaria has 



