g no M I C R O SCO P I C A L E S SAYS. 



It is a fmall animalculum, gelatinous, white, opake, without 

 -any vifible interlines, the upper part convex or gibbous ; many 

 ?of them were found in an infuhon of hay, alfo in other infufions. 



126. Cercaria Inquieta. Fig. 31 and 32, Plate XXV. 



Cercaria mutabilis convexa, cauda-Iaevi. Changeable -convex 

 icercaria, with a fmooth tail. 



* This animalculum fo often changes the form of if" s body, that 

 it is not eafy to defcribe it ; it is fometimes fpherical, fometimes 

 like a long cylinder, at others of an oval figure, white, gelati- 

 nous, the tail is filiform and flexible, the upper part vibrating 

 vehemently, no vifible vifcera, a pellucid globule may be obferved 

 at the bafe, and two very fmall black points placed near the top 

 at d, Fig. 32 ; whether they are eyes to the animalculum is not 

 known. Was found in fait water, a, Fig, 31, the body, b the 

 tail. 



127. Cercaria Lemna, Fig. 33, 34, and 35. 



Cercaria mutabilis, fubdepreffa, cauda annulata. Mutable 

 cercaria, fomewhat flattened, with an annulated tail. 



This animalculum puts on fuch various forms, that at firftlight 

 it appears like the proteus of Baker, though it is altogether 

 different. 



The body is capable of being contracted or extended, jdF the 

 Shape of an oblong .pear, or triangular, kidney-fnaped. The tail 



ihort 5 



