10 THE GENUS TRACHELOMONAS, 



Var. MINOR, n.var. (PI. i., f.lO). 

 Long. 26, lat. 23 /x. 

 Auburn 163. 



In this variation, if the papilla is wanting, a paler, weaker 

 spot often marks its position. 



Trachelomonas ovalis Playf. (PL i., f.ll). 



Lorica ovalis vel oblonga, collo nullo, perfecte glabra, achroa 

 vel luteo-fusca. 



Long. 30-44, lat. 22-34 /x. 



Guildford 146; Casino 189; Lismore 237. 



Track, armata is probably the outgrowth of this form, as the 

 posterior spines do not develop pari passu with the rest of the 

 lorica, but later. It is also very likely that there is a connection 

 between this species and Track. Botanica, as a broad, circular, 

 incrassate spot is sometimes noticeable at the hinder end. CJ. 

 these Proceedings, 1914, p. 141, PI. viii., f.4 Syn. Tr. lageiiella 

 Dangeard, Les Eugleniens, p. 131, f.40(non Stein). 

 Yar. lata, n.var. 



Lorica oblonga, prae forma typica latior, collo brevissimo in- 

 structa. 



Long. 38, lat. 32; lat. oris 6; coll. alt. 1 /x. 



Lismore 237. 



For the same length of cell, the breadth in this form is one- 

 fifth greater than in the type. 

 Yar. SCROBICULATA, n.var. 



Lorica crasse scrobiculata, translucens, candore carnoso. 



Long. 31-40, lat. 22-30 /x. 



Lismore 236, 237. 



This variation, like many other Australian forms, is of a pinky- 

 yellow or very pale brown colour, quite distinct from the clear 

 yellow of Track, volvocina and others, and which I designate 

 here by the name of buff. 



Yar. minor, n.var. (PI. i., f.l2). 



Lorica levis sed scrobiculata, candore carnoso, ovalis vel 

 oblonga, minor quam forma typica. 



