Microscopical Essays. 



Tt is fmooth and pellucid, the fore-part dilated into a femi- 

 eircle, decreafing in breadth towards the tail ; the hairs ftand as 

 rays from the femicircular edge at the front, one edge is fome- 

 times contracted. It is to be found in river water. 



236. Trichoda Delphinus. Fig. 8, Plate XXVL 



Trichoda oblonga, antice crinita, poftice cauda reflexa trim-, 

 cata. Oblong, the fore-part hairy, in the hind-part is the tail,; 

 which is turned back, the end of it truncated. 



A pellucid, fmooth, egg-fhaped animaleulum; the hind-part 

 Is produced into a tail about half the length of the body, dilated 

 at the upper end, and truncated ; it is always bent upwards. 



In the infide are veficles of an unequal fize; it fometimes 

 moves on it's belly, fometimes on one fide ; the tail feldom varies 

 in its pofition. Was found in hay that had been infufed for: 

 rfome months, a the hairs on the fore-part, b the tail. , 



237. Trichoda Clava. 



Trichoda clavata, fronte crinita, cauda reflexili. The club 

 trichoda, the fore-part hairy, the tail turned back. 



The fore-part is thick, the hind-part narrow, both extremities 

 obtufe, pellucid and replete with molecules, the hind-part bent 

 downwards towards the middle. . 



23S, Tri. 



