Microscopical Essays, 



Kolpoda Cucullus. Fig, 23, Plate XXV. 



Kolpoda ovata ventricofa, infra apicem incifa. Egg-fhaped 

 ventricofe, with an incifion in the fore-part. 



It is very pellucid, with a well-defined margin, filled with little 

 bright veficles, differing in number and fize. The figure of the 

 moftpart is oval, the top bent into a kind of an obtufe beak, 

 feldom an acute one, but fometimes oblong. It's interlines are 

 formed of from eight to twenty-four bright little veficles, thefe 

 are not confpicuous in the young ones ; fome have fuppofed that 

 thefe were anirnalcula that had been fwallowed by the kolpoda, 

 but Mr. Muller thinks they are the offspring of the kolpoda. 

 In fome only one cryftalline veficle occupies the middle of the 

 body. When the water is almofl exhaled, and death nigh, it 

 moves more flowly than ufual, and protrudes it's offspring with 

 violence. 



It moves in general with great vivacity, and in all directions, 

 a the cap or hood, b the incifion. It is found in infufions of 

 vegetables, and in fcedd hay. In fome few a tranfparent mem- 

 branaceous fubffanee may be perceived projecting beyond the 

 beak, and refemhling an exuvia ; the fame may be obferved in 

 the enchelis. vibrio, and it is probable that a decortation or call- 

 ing of the fldn has place in thefe anirnalcula, as well as in infects. 



542 



io3. 



109. Kol- 



