335 



NOTE ON THE ROTATORIAN FAUNA OF BOSTON, WITH 

 DESCRIPTION OF NOTHOLCA BOSTONIENSIS, S. n. 



By Charles F. Eousselet, F.R.M.S. 

 (Read October 2nd, 1908.) 



Plates 26 and 27. 



In August of last year I had the honour of attending, as the 

 delegate of the Quekett Microscopical Club, the Seventh Inter- 

 national Zoological Congress in the United States of America. 

 The members of the Congress, from all parts of the world, 

 assembled on August 19th, 1907, at Boston, where they were 

 most hospitably received and entertained by the American 

 zoologists and local men of science, and in particular by the 

 staff of Harvard University, in whose new Medical School 

 the meetings of the Congress were held. 



During a week's stay in Boston I examined the water of the 

 ornamental lake in the very pretty Central Park, and finding it 

 rich in Rotifeia I filled two bottles with condensed and preserved 

 material from this lake and from the " Frog Pond " close by, for 

 future study. 



The result of the examination of this material has brought to 

 light forty different species of free-swimming Itotifera, one of 

 which, Xotholca bostoniensis, is new to science ; another, a free- 

 swimming Oecistes, probably also new, but not sufficiently well 

 preserved to be determined with certainty, and several rare and 

 interesting species which have been met with only once before. 



The following is the list of species collected on Friday, 

 August 23rd, 1907: 



Rhizota. 



Floscidaria mutab'dis, Bolton. 

 Oecistes (sp. ?), free-swimming. 

 Conochilus unicornis, Bouss. 



