CULTURE AND MORPHOLOGY 93 



mann (1942 and earlier papers) with respect to the life cycles of 

 certain members of the order Nemalionales. On the basis of cul- 

 tures established from carpospores, they claim: (i) that Hymeno- 

 clonium serpens Batt. (fig. 7), which is die type species of die 

 genus, represents a tetrasporic phase in the life cycle of Bonne- 

 maisonia asparagoides (Woodw.) C. Ag. (fig. 8); (2) that 

 Vdkenbergia rufolanosa (Harv.) Schmitz (fig. 9), which is the 

 type species of the genus, represents a tetrasporic phase in the life 

 cycle of Asparagopsis armata Harv. (fig. 10) ; and (3) that TraiU 

 liella intricata Batt., which is the type and die only species of 

 the genus probably represents a tetrasporic phase in the life 

 cycle of Bonnemaisonia hamifera Hariot. Hymenoclonium, Fal- 

 \enbergia and Trailliella have all been genera of uncertain sys- 

 tematic position, and if J. and G. Feldmann are correct, these 

 three genera could be disposed of in a most satisfactory way. 



Although the illustrations given by }. and G. Feldmann con- 

 vincingly suggest that the filaments which develop from the 

 carpospores of Bonnemaisonia asparagoides and Asparagopsis ar- 

 mata are identical with plants of Hymenoclonium serpens and 

 Falkenbergia rufolanosa, respectively, the conclusion that these 

 pairs of species represent phases in the life of the same plant can 

 not be regarded as absolutely established until Bonnemaisonia 

 asparagoides and Asparagopsis armata have been obtained in cul- 

 ture from the tetraspores of free-living plants of Hymenoclonium 

 serpens and Falkenbergia rufolanosa, respectively. In addition, the 

 cytology of the two kinds of plants calls for study. This is particu- 

 larly necessary in view of the cytological work of Svedelius (1933) 

 on both Bonnemaisonia asparagoides and Asparagopsis armata. 

 His observations indicate that in both of these plants meiosis oc- 

 curs immediately after fertilization. The carpospores as well as the 

 Hymenoclonium- and Falf^enbergia-stages which issue from them 

 should thus be haploid. Consequently, it must be supposed, as do J. 



weeds, 193 1. Fig. 9 — Falkenbergia Hillebrandii {=} F. rufolanosa), 

 longitudinal section of portion of the polysiphonous thallus. (X 43°) • 

 From Kylin, Anatomie der Rhodophyceen, 1937. Fig. 10— Aspara- 

 gopsis armata, habit of plant. (X about 5/13 natural size). From 

 Harvey, Phycologia Australica, Vol. 4, 1862. 



