1900 ] CHLOROCYSTIS COHNIT Iof 
normal reproductive cells of the Petrocelis, but later came to 
consider them as something quite separate from this plant. 
These green cells growing with Petrocelis have been found in 
this country by Dr. Farlow (6), and recently Kuckuck (11) has 
decided the plant to be a Codiolum, having no distant connec- 
tion with its supposed host. 
After Chlorochytrium was described on Lemna a number of 
endophytic forms were discovered, some of which showed such 
marked resemblances to certain fungi that, had it not been for 
their green color, they would undoubtedly have been placed 
within that group. One of these “green parasites,” as they 
were popularly termed, was found by Wright (17) in 1876 grow- 
ing on various alge off the coast of Ireland, and called by him 
Chlorochytrium Cohnii. The discoverer of this form was so 
impressed with its fungus-like appearance and habit that he 
devoted considerable space to the discussion of how the plant 
Was in reality a fungus which had but recently acquired the 
Property of manufacturing chlorophyll. He was even able to 
observe the stages in this process as the plant developed. It is 
hot my intention to go into a discussion of how fungi and endo- 
Phytic algae are related to each other; I merely wish to describe 
One of the algal forms, and any comparisons to be made with the 
fungi must be left to another time. 
While collecting along the beach at Lynn, Mass., in Feb- 
mary 1897, my attention was attracted to the peculiar granular 
eesenee of some Enteromorpha which was growing attached 
to piles. When brought into the laboratory and examined under 
= See the alga was seen to be covered with a green 
wipe coe Organism which at first did not seem to have been 
pe cusly. described. Upon more careful examination and an 
ei orien of the literature upon the subject, it was 
Wri i nega plant must be the endophytic alga found by 
Sh : Chlorochytrium Cohnit. The material collected by me, 
this s ine ee fectly agree with any published account of 
Engle, "amd according to the keys in both De Toni (3) and 
oe Prantl (5) could not find a place within that genus. 
