248 



XII.— NEW HYPOTRICHOUS INFUSOEIA FEOM 



CALCUTTA. 



By Ekendeanath GtHOsh, M.D., M.Sc, F.E.M.S., Professor of 

 Biology, ]\Iedical College, Calcutta. 



(Bead June 15, 1921.) 

 Two Text-Figures. 



1. Balladinopsis nuda g. et sp. n., fig. 1. 



The body is rigid and elliptical, somewhat narrow anteriorly, and 

 rounded and wide posteriorly. The dorsal surface is convex. The 

 ventral surface is slightly convex. The peristome is narrow and 

 extends along the entire anterior margin and the anterior one-third 

 of the left side ; it then curves inwards nearly to the median line, 

 reaching the junction of the anterior two-thirds and posterior oue- 



/ f . 



.,\^ 





./ 



^ 



/ 



Y 



■yr 



^' 



Fig. 1. 



third of the body-length. The membranelles are long and 

 numerous ; the first five menibranelles are stout and gradually 

 increase in length, while the last few gradually decrease in length. 

 The ventral cirri are three in number and are placed in an oblique 

 longitudinal row parallel to and near the right peristomial margin 

 anterior to the middle of the body-length. The anal ciiTi are long, 

 five in number, and are placed a little in front of and protruding 



