332 FRESHWATER ALG^ OF LISMORE DISTRICT^ 



processes were noted also. The inflation in the centre of the 

 semicell shows that it is a reduced form of St. assurgens. The 

 formce immaturce figured by me, Desm. N.S.W., p. 192, PI. v., f.31, 

 are very similar forms; the dimensions there given, viz., long. 

 36-42, lat. 50-70, taken with those above, exactly tally with 

 Nordstedt's. 



Genus Onychonema Wallich. 

 Onychonema filiforme (Ehr.) R. k B. Bisset. (PI. xli., f.20.) 

 Long. cell. 12-16, lat. 16-22, isth. 2-3 /x. 

 Lismore (185). 



Syn., SphcETozosma filiforme (Ehr.) Ralfs; Onych. A'o7'dstedt- 

 ianum Turner, Alg. E Ind., p. 139, PL 17, f.l7. Forms, much 

 broader than generally given, were observed. Filaments are 

 occasionally seen with the cells separated from one another, 

 attached only by the tips of the clasper-processes. 



Onychonema l^eve var. micracanthum Nord. (PI. xli., f.21.) 

 Long. cell. 20, lat. 30 /x. 

 Lismore (185). 



Cf. Nordstedt, Desm. C. Brazil, T.3, f.34; Alg. Lugd.-Bat., p.3. 

 This species is, biologically, the fully developed form oiO. filiforme. 



PROTOCOC^COIDE^. 

 Fatn. VOLVOOACE.^. 

 Genus Chlamydomonas Ehr. 

 Including Chloromonas Gobi. Gobi has segregated forms of 

 Chlamydomonas which have no pyrenoids, into the genus Chloro^ 

 monas. But, in all the Frotococcoidece, the presence or absence of 

 pyrenoids depends entirely on the nutrition of the cell. More- 

 over, even when absent, the pyrenoids are often represented by 

 a greater or less number of scattered, irregularly-shaped, amyla- 

 ceous granules which seem to carry on the functions of a pyre- 

 noid. 



Chlamydomonas globulosa Perty. (PL xlii, f.l2.) 

 Diam. 14-28/x. 

 Lismore (236, 237, 242, 244, 247, 253, 258). 



