BY G. I. PLAYi'AIK. 131 



Trachelomonas O15L0NUA Lemmermann. (PI. vi., fi". 21). 



Noted both with and without a neck. This is what I take to be Lemmer- 

 mann 's type, l)ut I have not seen the tio^re. 



Long'. 17, lat. 12; colL long. 2J, lat. llju. Centennial Park (133). 



Trachelomon'as pulcherrima var. minou Pkyf. (PI. vi.. fig. 22). 



Long. 17 — 19, lat. 10/x. Plenty in the swampy corner of a tieUl in company 

 with Tr. puailla Playt'. Lismore (344). 



Trachelomonas Volzii var. .sulcata, n.var. (PI. vi., lig. 23). 



Forma parte anteriore sulcis 10—12 (5— U visis) per longitudinem dispositis 

 ornata. 



Long. 31—32, lat. 21; lat. coll. 3, alt. lA^. Botany (108). 



A form having the shape of the type, but with 5 or G sulcae running down 

 the face as far as the centre. Var. pellucida and var. ci/Undracea, previously- 

 known from Sydney only, are here recorded from Lismore also (328, 358). 



Trachelomonas ampullula var. major Playf. (PL vi., fig. 24). 



Forma scrobiculata, lateribus minime angulatis. po.stice liaud mamniillata. 



Long. 34 — 36, lat. 17—19; coll. alt. 2—3, lat. 5jj.. Lismore (344). 



This large form of Tr. ampullula is not always refuse and mammillate 4s 

 previously described (aiitea, 1915, p. 17, PI. ii., f. 7). In this case also the 

 membrane was coarsely but faintly scrobiculate, and the general outline only 

 very slightly angular. 



Var. GRACILIS, n.var. (PL vi., fig. 25). 



Forma major sed gracilior, lateribus levissime arcuatis, baud angulatis. 

 Long. 40, lat. 15; coll. alt. 3, lat. 4/i. Guildford (70). 



A slender form of var. major, with arched, not angular sides, the mammil- 

 late end very distinct. 



Var. ELLIPTICA, n.var. (PL vi., fig. 20). 



I'orma parva, gracillima, corpore perfeete elliptico, pone acute rotundato, 

 lateribus baud angulatis. 



Long. 25i, lat. 10^; coll. alt. 21, lat. 2i^. Lismore (350). 



A very graceful elliptical form, acutely rounded behind and absolutely 

 without any angularity. Clear pale yellow membrane. 



Trachelomonas clavata var. scisarmata Playf. (PI. vi., fig. 27). 



Long. 58, lat. 22; coll. alt. 9, lat. 7i^. Lismore (351). 



A very rare and curious species, only known previously from the Botanic 

 Gardens, Sydney, but now recorded from Lismore. The surface of the lorica 

 was reticulate, liowever, not scrobiculate. 1 have seen but 3 specimens of this 

 species and only 2 of var. subarmata; it is interesting to note that, however 

 bizarre in aijpearance and rare in occurrence a form may be, it will keep its dis- 

 tinguishing characteristics wherever it is found. 



Trachelomonas eubystoma var. parva, n.var. (PI. vi., fig. 28). 



Forma quam typica dimidio minor, magis rotunda, minime ovata, membrana 

 glabra, striis nullis nee punctis. 



