340 C. P. ROUSSELET ON THE ROTATORIAN FAUNA OF BOSTON. 



grounds of which there is a Lirge Like covering many acres. 

 Bowing out on this lake, I made a collection with the condensing 

 net, but on examination at home obtained therefrom only the 

 following six species of Botifera : 



Floscularia mutabalis, Bolton. 



Polyarthra platyptera, Ehrenbg. 



Diurella sty lata, Eyfert. 



Rattulus cylindricus, Imhof. 



Monostyla hmaris, Ehrenbg. 



Anuraea cochlear is, Gosse. 

 No doubt a closer examination of various parts of this lake, 

 and at various seasons, would bring to light a much greater 

 number and variety of Botifera. 



Explanation of Plates 26 and 27. 



Fig. 1. Notholca bostoniensis, sp.n., lateral view, x 425. 

 ,, 2. ., „ dorsal view, x 425. 



3. ,, ,, ventral view, x 425. 



, 4. „ ,, lateral view, x 220. 



5. ,, longispina, dorsal view, x 220. 



,, 6. Pterodina parva (Tern etz's figure), x 575. 



Jov.ru. Queketi Microscopical Club, Her. ;', Vol A*., A'o. C3, November U'OS. 



