LESQ.UEBEUSIA SPIRAL1S. 



69 



line is continued in a straight line down to the mouth ; 

 the orifice circular, contracted, its margin plain and 

 sharply defined ; the surrounding membrane thin. 

 The plasma pale yellow, as seen through the trans- 

 parent test ; nucleus single, situated posteriorly ; the 

 pseudopodia as in Difflugia, long, blunt, simple, or 

 branched. 



PIG. 75. Lesquereusia spiralis, showing the " vermiform pellets " re- 

 presented only on part of the test. Terrington, W. Yorks. From 

 a drawing by Gr. S. West (reduced), x 390. 



Dimensions : Average length, including the neck, 

 120 p; breadth 95 /*. 



In marshes amongst Sphagnum and other sub-aquatic 

 vegetation, frequent and universally distributed. 



This handsome rhizopod is found most commonly in 

 places where Sphagnum abounds, and more especially 

 in lowland bogs. It is very mobile, and readily dis- 



