126 
Kuckuck in « Bemerkungen zur marinen Algenvegetation von Helgo- 
land », I, p. 244. The most essential differences between thè West 
Indian form and Ralfsia verrucosa are, that thè sporangia in thè first- 
mentioned form seem to be somewhat longer sometimes nearly da- 
vate, that thè sporangia have a small celi at their base, which is 
not mentioned in Kuckuck’s description nor found in thè excellent 
figures of Ralfsia verrucosa in Reinke’s « Atlas » ; only in Harvey, 
« Phycologia Britannica », pi. XCVIII, fig. 5 such a celi is figured. 
As to thè plurilocular sporangia a difference is also present, thè 
large top celi of thè sporangia in Ralfsia verrucosa being after 
Kuckuck 1. c. p. 242 colourless and sterile. On thè other hand, thè 
paraphyses of thè West Indian form seem quite to agree with those 
of Ralfsia verrucosa. 
So long as our knowledge of Ralfsia verrucosa and its different 
forms remains somewhat deficient (cfr. Reinke, 1. c. and Kuckuck 1. c.), 
I think it most correct to consider our form as a special species. 
Should later examination of thè different forms now referred to Ralfsia 
verrucosa show, that they all belong to this species, it would per- 
haps be most naturai to consider thè West Indian form also as a 
variety of R. verrucosa . 
This species occurred in shallow water near thè surface of thè 
sea on rocks and stones in rather exposed as well as more sheltered 
localities. It is found with unilocular and plurilocular sporangia in 
thè months December - March. 
It is common in thè sea round St. Thomas and St. Jan. 
Aglaozonia canariensis Sauv. 
C. Sauvageau, Observations sur quelques Dictyotacées et sur un 
Aglaozonia nouveau (Bulletin de la Station biologique d’Arcachon, 
8, 1904-5). 
Compare: Ralfsia ceylanica Harv. in Ethel S. Barton, List of 
Marine Algae collected at thè Maldive and Laccadive Islands by 
J. S. Gardiner (Linnean Soc. Journ., Botany, voi. XXXV, p. 477, 
pi. i3, figs. 1 -4). 
Zonaria parvula Grev. var duplex Heydrich, F. Heydrich, Beitràge 
zur Kenntnis der Algenflora von Kaiser - Wilhelms - Land (Deutsch - 
Neu- Guinea). (Berichte d. deutsch. bot. Gesellsch., Bd. X, 1892, p. 458). 
