THE ALGAE OF BERMUDA. 67 



Sweden and Great Britain, and also in Uruguay. The Bermuda 

 plant is dioecious, agreeing in that respect with the South American 

 form; in Europe the species is monoecious. Another Vaucheria was 

 found at Hungry Bay, Collins, but being sterile could not be specifi- 

 cally determined. 



DiCHOTOMOSIPHON Emst. 



D. PusiLLUS Collins, 1909, p. 431; P. B.-A., No. 2023. Bailey's 

 Bay, Jan., Harrington Sound, March, Inlet, March, Hervey; Shelly 

 Bay, Hungry Bay, April, ColUns. Apparently common, forming 

 dark green or almost black mats on rocks, Udotea etc., or loose floating 

 felts. At Bailey's Bay it was found with filaments 50 /x diam. ; the 

 normal diam. does not exceed 30 ix. In the material from Harrington 

 Sound, the contents of the filaments is often divided into sections, 

 approximately as long as their diameter, separated by a narrow trans- 

 parent space in a plane at right angles with the axis of the filament. 

 This may be preliminary to the formation of spores of some sort, but 

 no more advanced stage was seen. 



Family CHAEACEAE. 

 Chaea Agardh. 



*C. GTMNOPUS var. Berteeoi A. Braun, 1882, p. 195. Pembroke 

 Marshes, Jan., Farlow. The specimen in the Farlow herbarium was 

 characterized by Nordstedt, in litt., as "forma tenuior" which we 

 understand to be merely descriptive, not a name. 



