419 



cells contain a great deal of starch and are coloured quite black 

 by Iodine. A single nucleus is present in each cell. 



In some of the cells zoospores were present (Fig. 400 e). The 

 whole cell with its elevation is transformed into a sporangium. 

 The zoospores are about 2 ( broad and 4 /* long with acute ante- 

 rior end and broadly rounded dorsal end. They are formed in a 

 number of about 15 in each cell, somewhat varying according 

 to its size. The zoospores escape by means of a short channel 



Fig. 400. Endoderma vagans nov. spec. Compare text. 

 (a, about 150:1, b and e, about 250:1, c and d, about 500:1.) 



through the membrane of the host plant which is formed by the 

 elevation of the cell. The cilia were not visible. 



There is still to be added that now and then the contents 

 of the small cells mentioned above were divided into several 

 small narrow bodies lying above each other up to a number of 

 5 6 or more (Fig. 400 c and d}. They were filled with starch, 

 becoming very dark when coloured by Iodine. What their func- 

 tion was 1 cannot tell, having not been able to follow their 

 development, for which purpose living material is necessary. 



The Griffithsia, in which this plant occurred, was dredged 

 in a depth of about five fathoms in the month of January. 



St. Croix: Near Buck Island. 



27* 



