314 FRESHWATER ALG^ 01' LiSiUuRE DISTRICT, 



Lismore(185, 223, 260, 261). 



Bofryococcus Brauiiii very rare, only just recorded. 



[For genus Trochisia, see Appendix, under Chytridiacece.] 



BACILLARIE^. 



Genus Amphora Ehr. 

 Amph. Lagkrheimii var. minuta, n.var. (Pl.xlv., f.8.) 



Forma minima, striis nullis visis. 



Long. 15-20; lat. frust. 7-9, ap. 3; lat. valv. 4-5 /x. 



Lismore(211). 



Cf. A. Lage7'heimii Cleve, Diatomiste ii., p. 99, PL vii., f.2; 

 Synopsis ii., p. 11 8. The latter is a very rare form, known only 

 from Ecuador. Cliaracteristic of the species is the short, stauri- 

 form mark in the centre of the dorsal margin. The type mea- 

 sures 50-70 /x in length, and was obtained from rocks moist with 

 fcesh water. Var. minuta was found, alive, in some quantity, 

 in a mucous stratum of Phorm. corium, at the edge of an open 

 concrete water table in Carrington Street. The chloroplasts were 

 very distinct, with four minute elieoplasts as figured. 



Genus Staukoneis Ehr. 

 Stauronkis fulmen Brightwell. (PI. xlv., f.9.) 



Long. 114-1 96; lat. valv. 30, subapic. circ. 12; crass, frust. 30-33/x. 



Lismore(185, 240, 249). 



Known only from Java, Australia, and !New Zealand. Cf. 

 Brightwell, Micr. Journ., vii., p. 180, PI. ix., f.6. Widespread in 

 swamps throughout this country. There is a double columella, 

 with a true raphe (undulate) in the space between. Cleve, Syn. 

 i., p. 150, gives this form as capitate. T have never noted it, 

 however, with more than a rostrate apex. Here, the apices are 

 exactly those of Stanr. acuta, of which Cleve considers it a 

 variety. 



Genus Pinnularia Ehr. 

 PiNN. STREPTORAPJiE var. GiBBOSA A. Cleve. (PI. xlv., f.lO.) 

 Long. 140, lat. 20 /x. Striae 7 in 10 fx. 

 Lismore (185). 



