BY G. I. PLAYFAIR. 19 



Common and widespread. The puncta-granules are minute, 

 and merely giv e the edge a sandy appearance. It is possible that 

 the forms of this species, which are generally oval and more 

 rarely subglobose, should be arranged as granulate variations of 

 Tracli. intermedia Dangeard. There is nothing specifically char- 

 acteristic in the condition of the membrane; smooth, punctate, 

 and granulate are merely three degrees of development due to 

 the age of the infusorian, and probably also to the stagnation of 

 its habitat. Each of them may (and often does) occur in unmis- 

 takable forms of the same species, e.g., Tr. volvocina, Tr. pnl- 

 cherrima, Tr. conica. 



Var. SUBGLOBOSA, n.var. (PI. ii., f.l9). 



Lorica subglobosa. Long. 19-28, lat. 17-26 /x. 



Botany 142, 151; Lismore 236, 245. 

 Var. OBLONGA, n.var. (PL ii., f.20). 



Lorica late-oblonga sed non quadrata. Long. 24, lat. 20 /x. 



Guildford 114. 



Thachelomonas australis, n.sp. (PL iii., f.2). 



Lorica cylindracea, lateribus parallelis, polls late-rotundatis; 

 vulgo collo nuUo; minute dense granulata; candore carnoso. 



Long. 24-30, lat. 14-18; lat. oris 4 /x. 



Botanic Gardens 150; Canley Vale 110; Guildford 70, 146; 

 Fairfield 79; Botany 142, 145, 151, 152; Lismore 238, 240. 



This form has the same minute granulation as Tr. granulosa, 

 but its cylindrical shape makes it very distinct. It differs also 

 in colour, being generally pale biscuit-colour or buff, whereas Tr. 

 granulosa is generally deep yellow, reddish-yellow, or dark red. 

 Var. OBESA, n.var. (PL iii., f.3). 



Lorica prse forma typica latior, minus cylindracea, lateribus 

 modice arcuatis nee planis. 



Long. 28-34, lat. 20-25; lat. oris 4 /x. 



Botanic Gardens 150; Parramatta Park 96; Fairfield 79; Botany 

 151; Lismore 236, 237. 



Broader and less cylindrical than the type, with slightly arched 

 sides. Its finer granulation alone distinguishes it from Trach. 

 hispida var. granulata. 



