34 THE GENUS TRACHELOMON AS, 



Var. MINIMA, n.var. (PI. v., f.l3). 

 Forma minima nee ore everso. 

 Long. 9, lat. 5 /x. 

 Fairfield. 



Noted in a gathering squeezed out of Myriophyllum in Orphan 

 School Creek. 



Var. ELEGANS, n.var. (PL v., f.l4). 

 Lorica corpore breviore quam in var. minima-, collo autem 

 longiore, ore everso valde producto; basi per papillam affixa. 

 Long. 13, lat. 5J/x. 

 Guildford 88. 



Trachelomonas triquetra, n.sp. (PI. v., f.l5). 



Loriea corpore superne exacte rectangulari lateribus rectis 

 parallelis, inferne acuminato lateribus planis rapide ad caudam 

 convergentibus; collo recto brevi; cauda brevi; membrana tenui 

 scrobiculataC?). Lorica a vertice triquetra. 



Long. 40, lat. 20 /x. 



Parramatta 136. 



Several of this shape seen alive among a great variety of other 

 tailed forms (Parramatta 136). All these plankton-forms of 

 Trachelom,onas have thin transparent membranes, dull and rather 

 irregular in texture (scrobiculate*?) and are all very pale-coloured, 

 pale brown, biscuit or flesh-colour. 



Trachelomonas gibberosa, n.sp. (PI. v., f.16-18). 



Lorica inflata rhomboidea, utrinque valde angulata, in medio 

 latissima, lateribus superne ad collum inferne ad caudam rapide 

 convergentibus, psene rectis; collo plerumque oblique truncato 

 interdum ore everso; cauda acutissima; membrana hyalina vel 

 dilutissime f ulva. 



Long. 32-56, lat. 16-30; coll. alt. 8, lat. 6-7; caud. long, ad 20 [x. 



Parramatta 136, 165, 166. Auburn 120. 



Almost all the tailed forms of IVachelomonas may be found 

 now and again with obliquely truncate necks. 



