48 



MAKA'ELS OF POND-LIFE. 



On the body of the Canthocamptus were some 

 small transparent vases or bottles, containing living 

 objects, which sprang np and down. These were 

 members of the Vorlicella family, called Cothurnia 

 and will be hereafter described. 



Watching the hydra it Avas curious to note the 

 changes of form which these creatures are able to 

 assume. Now, the tentacles wjre short and thick, 

 and the body squat; now the body was elongated. 



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Hydra vtj-idis, in various shapes. 



like the stem of a palm tree, and the tentacles 

 hung gracefully from the top. From some of the 

 polyps little round buds were growing, while other 

 buds were already developed into miniature copies 

 of the parent, and only attached by a slender stalk 

 In a few days many of these left the maternal 

 side, fixed their own little tails to the glass, and 

 commenced housekeeping on their own account. 

 Polyps may be obtained at all times of the year 



