— 185 — 



Chrysymenia Enteromorpha Harv. 



Harvey, "Nereis Boreali-Ainericana", Part. II, p, 187. 



Of this nice species I have found a few specimens in deep 

 water in the sea round St. Jan. These reached a height of more 

 than ten cms. (in the biggest spe- 

 cimen collected the basal part was 

 wanting). To begin with, as descri- 

 bed by Harvey, the plant con- 

 sists of a single saccate oblong 

 frond, two — three cms. long, which 

 at its base tapers into a short stalk 

 ending in a small disc, by means 

 of which the plant is fastened to 

 the substratum. From this primary 

 sac similar, often somewhat nar- 

 rower and longer, secondary sacs 

 originate to all sides and these are 

 again ramified in the same way 

 and so on (Fig. 5). At their base 

 the sacs are always strongly con- 



Fig. 5. Chrysymenia Entero- 

 morpha Harv. 

 (about natural size). 



Fig. 6. Chrysymenia Enteromorpha Harv. 



A, membrane-cells seen from the innerside; the cell 

 near the middle with a group of glands (70:1). B, 

 another cell with glands (70 : 1). C, transverse section of 

 the membrane, in the middle a cell with glands (70 : 1). 

 D, glands (70:1). E, part of the membrane seen from 

 above (compare the text) (125 : 1), 



stricted, while their apices are 

 broadly rounded. The sacs 

 are nearly cylindric some- 

 times somewhat flattened. 



The membrane is rather 

 thin and somewhat gelati- 

 nous. It consists for the most 

 part of a single layer of cells 

 (Fig. 6 C) which only at their 

 margins are covered by a 

 layer of bark-cells. Seen from 

 the surface this arrangement 

 therefore gives the cell-tissue 

 an embroidered-like appea- 

 rance (Fig. 6 E). The bark- 

 cells are largest just over the 

 margins of the large mem- 

 brane-cells, growing smaller 

 and smaller from here. 



