356 TUFTS COLLEGE STUDIES, VOL. II, No. 3 



ing, spherical masses, 1-3 cm. diam., lying loose on the bottom, 

 or slightly attached by rhizoidal growths ; filaments about 45 p. 

 diam. at base, up to 90 p. in the main branches, ramuli 45 p., 

 terminal cells clavate or blunt-lanceolate, often swollen near the 

 tip ; cells mostly somewhat larger at the top than at the base ; 

 branches quite irregularly placed, densely packed. Mass. 



Europe. 



In the only reported American locality, this species was 

 washed ashore in the form of small, hard, globular masses, 

 each a densely branched individual. Other forms of the Aega- 

 gropila type probably occur, but no definite reports are to be 

 had. 



53. C. UBERRIMA Lambert ms.; P. B.-A., No. 1531. Frond 

 minute, seldom over i cm. high, attached below by short, 

 irregular, branching filaments ; main filaments 30-50, rarely 

 60 p. diam., cells 3-10 diam. long; densely branched, branches 

 opposite or alternate, erect or patent, issuing from any part of a 

 cell ; the first cross wall either at the base of a cell or higher 

 up ; erect branches often connate with each other or with the 

 main stem for some distance ; ultimate ramuli straight or curved, 

 15-20 p. diam., cells 5-10 diam. long; terminal cell slightly at- 

 tenuate, with rounded apex. Production of zoospores and 

 gametes very abundant, in terminal or intercalary cells, in all 

 parts of the frond ; new growth from cell below often passing 

 through the empty sporangium. 



A rather anomalous species, presenting some remarkable 

 peculiarities ; this notice is merely preliminary ; a detailed 

 account of the plant is soon to be published by Professor Lam- 

 bert, who has had it under culture at the Botanical Laboratory 

 of Tufts College. 



Among the doubtful species of Cladophora must be reckoned 

 the following. 



C. trinitatis Kiitzing, 1849, p. 420. 



C. Morrisiae Harvey, 1858, p. 78, PI. XLV.B. 



Aegagropila Montagnei Kiitzing, 1849, p. 415 ; 1855, p. 14, 

 PI. LXV, fig. 2. 



Spongopsis saccata Kiitzing, 1849, p. 380; 1853, p. 17, PL L, 

 fig. i. 



4. SPONGOMORPHA Kiitzing, 1843, p. 273. 



Fronds of branching, monosiphonous filaments, larger at the 

 tip than below, terminal cell longer than other cells, intercalary 



