30 



Systematik, 5te Afdeln., 1886, VIII, p. 97. Kuckuck, Uber den Bau und 

 die Fortpflanzung von Halicystis Aresch. und Valonia Ginn. (Bot. Zeit., 

 1907). BoRGESEN, 1. c, p. 243. 



The specimens found agree very well with the description 

 and figures of Kuckuck, 1. c. At the base of the large vegetative 

 cells small lens-shaped cells occur, provided more or less abun- 

 dantly with rhizoids. Also large lens-shaped cells were present 

 in rather great number. 



I would not have kept this form separate from the follow- 

 ing species, if Kuckuck had not found differences in their zoo- 

 spores. This I have not been able to substantiate in my mater- 

 ial preserved in alcohol ; judging from this alone I would have 

 been most inclined to consider them as forms or varieties of 

 the same species only. 



I have found this species growing in rather exposed locali- 

 ties in shallow water and in deep water at a depth of about 30 

 meters. 



It is found, St. Croix: at White Bay; St. Jan: off Cruz Bay. 



Geogr. Distrib. Mediterranean. 



3. Yalonia iitricularis (Roth) Ag. 



C. Agardh, Species Algarum, vol. I, 

 1821, p. 431. J. Agardh, Till Algernes 

 Systematik, 5te Afdeln., VIII, 1886, p. 98. 

 P. Kuckuck, tJber den Bau und die Fort- 

 pflanzung von Halicystis Aresch. und Va- 

 lonia Ginn. (Bot. Zeit. 1907). Borgesen, 

 I. c, p. 244. 



Conferva utricularis Rotll, Cat. I, p. 160, 

 tab. 1, fig. 1; Cat. II, p. 187. 



forma typica Kuck. 1. c. 

 forma Crustacea Kuck. 1. c. 



The forms I have referred to this 

 species seem to agree very well with 

 those described by Kuckuck, 1. c. In 

 the specimens which occur on exposed 

 places, the small lens-shaped cells were 

 present in great number. They occur- 

 red not only in the basal part of those 

 cells by which the |)lant is fastened to the substratuni. ])ut also 

 in other parts of the cells, especially in the furrow whore the 



Fig. 17. 

 1 alonia utricularis (Rothi Ag 



forma Crustacea Kuck. 

 Habit of plant (about 6:1) 



