BY G. I. PLAYFAIR. 131 



In this var. limnetica (1898) should be included all Lemmer- 

 mann's granulate Lynghyce^ viz., L. gloiophila, lieise n.d. Pac. 

 p. 355 (1899); L. perelegans, I.e. (1899); and L . bipunctdta, Forsch. 

 Biol. Stat. z. Plon, T. 2, £.48(1900). These differ from one 

 another very slightly, and that, too, only in the breadth of the 

 filament and length of the cells, points which are valueless for 

 the formation of even distinct variations when the general char- 

 acteristics are identical. From a note by G. S. West, Third Tan- 

 ganyika Exp., p. 175, it would appear that L. Nyassce Schmidle, 

 should be included here as a synonym also; it has the attenuate 

 and capitate apex of the type. 



Yar. BACiLLiFORMis, n.var. (PI. vi., f.5). 

 Fila clare cgerulea, diam. 1^ (vagina observata) cellulis dis- 

 junctis, alt. 6 /;t, utroque polo granulis magnis singulis ornatis. 

 Lismore(2a). 



Var. AMYLACEA, n.var. (PI. vi., f.6). 



Fila pallide cserulea, dissepimentis indistinctis rarissime cer- 

 nendis. Protoplasma homogeneo amylo diffuso spissum. 



Diam. 2-3 /x, cell, haud visibilibus, apicibus rotundatis. 



Lismore (12, 21), in Lyngbya stratum (26). 



Diam. 2 /x, et basi aflixa et libera. 



Lismore (16). 



Diam. 2-2j/x(vagina, observata); cell. alt. 4-8 (rarissime ad 12/x), 

 apicibus attenuatis nonnunquam capitatis etiam vel subcapitatis, 

 dissepimentis interdum sed rare cernendis. 



Coraki, river-brink, in Spirulina stratum (27). 



I have had this form under observation for years in Sydney, 

 where it generally occurs in almost every mixed gathering of 

 freshwater algte. Its colour and size had already connected it 

 in my mind with 0. splendida^ and this became a certainty by 

 finding it, in this district, with the characteristic apical cell of 

 var. attemiata, and by its close association with the granulate 

 forms. The protoplasm is opalescent, with diffused amylum, so 

 that the dissepiments are generally quite hidden, and the fila- 

 ments very different in appearance from the transparent filaments 

 of the type. Var. limnetica and all other granulate variations 



