BY G. I. PLAYFAIR. 33 



Trachelomonas napiformis, n.sp. (PI. v., f.lO). 



Lorica corpore ovato, f route rotundato, a tergo acuminato 

 lateribus modice arcuatis; stipite nullo sed cauda brevi instructa; 

 collo quadrate, lateribus parallelis, ore everso. Primum cauda 

 extrenia atRxa, deinde exsoluta. 



Long. 34, lat. 18; coll. ait. 8, lat. 6; caud. long. 6 /x. 



Parramatta 136. 



All these tailed varieties are plankton-forms. Tr. napiformis 

 and all others in sample No. 136, were obtained from a body of 

 freshwater in Parramatta Park, by passing several gallons of 

 water through filter-paper. Many specimens of this form were 

 noted firmly fixed by the point of the tail, others were swimming 

 free. Syn., Tr.caudata, these Proceedings, 1913, P1.57, f.lO., 

 Forma. 



Forma lateribus ad caudam convergentibus pfene planis; cauda 

 brevissima, triangulari ; collo oblique truncato nee ore everso; 

 colore psene hyalina. 



Long. 36, lat. 22; coll. alt. 4, lat. 7 fx. 



Botany 151. 



Var. ELEGANS, n.var. (PI. v., f.ll). 



Major quam f. typica, corpore ovato superne valde angulato, 

 lateribus arcuatis, paullo supra caudam quam l.evissime angulatis, 

 ad caudam convergentibus ; collo quadrato lateribus modice 

 retusis, ore everso valde producto; colore dilutissime fulva. 



Long. 60 (corp. 40), lat. 30; coll. alt. 8, lat. 8, lat. oris 16; caud, 

 long. 12/x, 



Duck Creek near Clyde. 



Several specimens observed in a sample obtained by filtering a 

 considerable volume of water. 



Trachelomonas sESSiLis,^n.sp. (PL v., f.l2). 



Lorica corpore late-ovato psene triangulari, superne latissimo, 

 abhinc lateribus rapide ad basin convergentibus, inferne acute- 

 rotundato, cauda nulla; collo longo recto, lateribus parallelis, ore 

 everso; colore dilutissime fulva; primum sessilis. ^ ' k'^' 



Long. 26, lat. 20; coll. alt. 8, lat. 6 /x. 



Parramatta 136. 



LIBR ARVr 



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