90 DROPS OF WATER. 



vided with a proboscis about twice the length of 

 the body, protruding from the circumference of 

 the globe, and busily engaged in moving the 

 mass, and at the same time gaining food. The 

 whole has much the appearance of a mulberry, 

 whence the name of the English species, P. morum 

 (Drop II. fig. 4), which is found amongst Conferva 

 and Lemna. The regular rolling motion of this 

 beautiful creature adds greatly to the delight of 

 the spectator : this movement is not very rapid, 

 so that it can be watched with ease. I once 

 witnessed the disruption of the transparent case, 

 and the escape of the numerous individuals : some 

 of these had already the wrinkled appearance 

 produced by the preparation for self-division. The 

 globe, as I watched it, seemed to have lost its 



