/rs 



JOUBNAL 



OP THE 



ROYAL MICROSCOPICAL SOCIETY. 



FEBRUARY 1903. 



TRANSACTIONS OF THE SOCIETY. 



I. — The Rotatorian Gemis Diaschiza : 

 A Monographic Study, with Description of a New Species. 



By F. R. Dixon-Nuttall, F.R.M.S., and 

 The Rev. R. Freeman, M.A. 



(Read December \ltli, 1902.) 

 Plates I. to IV. 



It is with a certain amount of diffidence that we venture to put 

 before the Fellows of this Society a monograph with the above 

 title. 



The genus Furcularia has, since its foundation by Lamarck 

 (1816), been made to contain such a heterogeneous mass of gene- 

 rically distinct rotifers as Notommata aurita, Diglena catellina, 

 Scaridium longicaudum, Dinocharis pocillum, &c. 



From time to time various authors have divided and subdivided 

 this genus ; whilst other authors have referred some of the species 

 to other genera already in existence. 



EXPLANATION OF PLATE I. 



All fig^, except fig. 2, x 476. 



1. — Diaschiza gibba Ehren. Lateral view. 



„ „ „ The male, lateral view. 



„ tenuiseta Burn. Lateral view. 



„ derea Gosse. Lateral view. 



„ „ „ Dorsal view. 



„ gracilis Ehren. Lateral view. 



„ „ „ The male, lateral view. 



B 



