417 



Fig. 398. Endoderma viri.de (Rke. ) 



Lagerh. from the epidermis of Dictyota 



indica. (About 175:1.) 



Further, in the thick membrane of Hypnea cornuta an Endo- 

 derma occurred whose cells were subcylindrical or sometimes 

 more irregular with small ele- 

 vations. As large cells are not 

 present in the cortical layer 

 of the Hypnea the endophyte 

 creeps everywhere at random, 

 forming an irregular network 

 by means of its filaments which 

 are ramified on both sides. The 

 cells were about 5 7 ^ thick 

 and up to 40 y. long. The Hyp- 

 nea was found in the harbour 

 of Charlotte Amalia, St. Tho- 

 mas. 



Furthermore an Endoder- 

 ma (Fig. 398) was found in 

 the epidermis of Dictyota in- 

 dica. It is freely dendritically ramified with branches issuing 

 from both sides of the filaments and spreading widely in the 

 host, following mostly the way above the vertical walls of its peri- 

 pheral cells. The cells of this Endoderma have more or less sinuate 

 walls and reach a length of up to 30 \a and a breadth of up to 

 15 ja. The cells are filled with granular contents, rich in starch. In 

 the cells one or two pyrenoids are present. This form was dredged 

 off Frederikssted, St. Croix in a depth of about 10 fathoms. 



A very simi- 



lar Endoderma was 

 found in Spyridia 

 filamentosa gathe- 

 red at the shore 

 of Green Cay 

 Estate, St. Croix. 

 In an old Cau- 

 lerpa another En- 

 doderma was found 

 of which the ac- 

 companying Fig. 

 399 shows some 



Fig. 399. Endoderma viride (Rke) Lagerh. 

 Forma. Comp. text. (About 260:1.) 



