218 



The specimens found (Fig. 168) agree very well with the 

 description of Mrs. Gepp (nee Barton) 1. c. In one specimen 



from Coral Bay, the lower- 

 most peltate leaves had 

 no vesicles, these were on 

 the other hand well deve- 

 loped in the upper fructi- 

 fying part of the plant. 



It is found in fruit from 

 December to March. 



T. trialata occurs together 

 with species of Sargassum 

 in the littoral and upper- 

 most sublittoral region and 

 on exposed as well as more 

 sheltered places. 



It is a common species along 

 the shores of the Danish Isles. 

 Fig. 168. Turbiyiaria trialata Kniz. Geogr. Distrib. Seems to 



(About natural size). occur in all warm seas. 



Sargassum G. Ag. 



1. Sargassum vulgare G. Ag. 



C. Agardh, Species Algarum, vol. I, p. 3. J. Agardh, Species Sar- 

 gassorum Austral., p. 108. A. Vickers, Phycologia Barbadensis, part II, 

 pi. II. F. BoRGESKN, in Mindeskrift for Japetus Steenstrup, 1914, .No. 

 XXXII, p. 3. 



Fucus nutans Turner, Fuci, p. 99 (101), pi. 46, fig. a. 



var. tijpica. (Fig. 169). 



The specimens which I have referred to the typical form are 

 very much like the figure given by Turner (1. c). The linear- 

 lanceolate leaves possess a dentate-sinuate margin, a distinct midrib, 

 and quite numerous, but small and irregularly placed cryptosto- 

 mata ; the latter are sometimes very indistinct or quite absent 

 in some of the leaves. 



The vesicles are sometimes few, sometimes numerous ; they 

 are globular, of the size of a small pea, and most often they are 

 without prolongations at the top ; such ones occur, however, now 

 and then. 



The receptacles are cylindric, filiform and irregularly ramified. 



