ADDENDA. 



A FEW specimens received while the preceding pages were 

 passing through the press, call for the following few notes. 



Class RHODOPHYCE^E. 



Genus GELIDIUM, Lam. 







Purple or red sea-Veeds with a cartilaginous or horny, opaque 

 frond, without joints. Fronds flattened, irregularly branched. 



GELIDIUM CORNEUM, Lam. 



Fronds flattened, rigid, several times pinnate ; a very 

 variable plant about an inch in height, (Pacific Coast plants 

 3-4 inches high). Spores imbedded in irregular clusters near 

 the ends of the branches. 



Twelve or more varieties of marine forms of this specie's 

 have been described, but none affecting inland waters. F. A. 

 Anderson collected specimens in a rapid mountain stream, 

 Montana. They were attached to river stones. The speci- 

 mens received were small in size and limited in number; 

 more have been requested for confirmation of our identifi- 

 cation, but cannot reach us in time for notice on these pages. 

 Seems but reasonable that where Enteromorpha abounds, 

 Gelidium may flourish also. 



Class CHLOROPHYCE^L. 



DOCIDIUM EHRENBERGII, Rail's. V. Des. TJ. S., p. 159. 



Diameter 10-12 times longer than broad, having usually 

 two, or rarely three slight inflations at the base of the semi- 

 cells ; ends truncate, bordered by three to five minute tuber- 

 cles which give the end view a crenate appearance. Empty 



