Australasian Rotifer a. By J. Murray. 461 



the margin that the specimens often curl up in the form of a 

 volute. 



The dorsal anterior margin is most prominent in the middle 

 line, and falls away on either side in nearly straight lines, making 

 a very obtuse angle. The crenations appear to be the ends of 

 narrow plates which cause the striated appearance. The details 

 of the anterior will be best understood from fig. 45, which shows 

 the ventral side. 



Hahitat. — Pond in the moraines of the Miiller Glacier, Xew 

 Zealand ; very abundant. 



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