4q6 M.I-C roscdpical Essays. 



This ammalcultim has the power of retracting thefe projec"tioiis s 

 and making both ends appear obtufe. It moves about but 

 i lowly, and was found in water with the lemna minor. 



47. Enchelis Truncus. 



Enchelis cylindrica, fubcapitata. Fig. 10, Plate XXV. Cylin- 

 drical enchelis with a kind of head. 



This is the iargefl of this kind of animalcula; the body is, 

 cylindrical, mucoie, grey, long and rather opake, the fore-part 

 globular, the hind-part obtufe. Something like three teeth (c) 

 may be fometimes feen to proceed from one of the fides ; it can 

 alter it's fhape confiderably. Globules of different fizes may be 

 feen within the body. It rolls about (lowly from right to left. 



48. Enchelis Larva* 



Enchelis elongata, medio papillula utrinque notata. A long 

 enchelis, with two little nipples proje&ing from the middle of the 

 body, one on each fide. 



It is long, round, and filled with grey molecules ; the fore-part 

 is obtufe and pellucid ; a kind of neck, or fmall contraction, is 

 formed at fonie little difiance from this end. The lower part 

 pointed, about the middle of the body there are two fmall 

 projections.. 



49. En- 



