30 I I ILLIN8 WD lil.i;\ El . 



*L C. botbi li- Meneghini ex Elalfs, L848, p. 99, PL XVI, fig. 1; 

 Wolle, 1884, p. 71. PL XIII. fig. 5; G. S. West, L911, p. L, PI. XCVI, 



1. 2, 5 L5; I*. B.-A., No, 2062. In artificiaJ reservoir for h 

 water near Spanisli Elock, Dec, Hervey. 



Mesotaentum Nageli. 



*M. Endlu berianum Nageli, L849, p. 109, PL VI. B; G. S. West, 

 L904, p. 56, PL I\'. figs. 20 21; P. B.-A., No. L857. Among other 

 algae in a ditch, fresh water or nearly so, Devon-hire Marsh, April, 



( 'ollins. 



Family ZYGNEMACEAE. 



Spirogyra Link. 



S. submarixa (Collins) Transeau, 1915, p. 25; S. decimina var, 



subtiifirina Collins, 1909, p. 110; 1912, p. 72. Ditch in South Shore 

 marshes, Sept., Collins. This was first described as a variety of 

 S. deeim inn, which it considerably resembles, and it was known from 

 three widely separated stations in New England. The Bermuda 

 material emphasizes the differences from S. decimina; the long cells, 

 up to 8 diam., and the considerably swollen fertile cells; the material 

 from the Elizabeth Islands, Collins, 1912, p. 72, has cells as small as 

 21 /x diam. 



Family VOLVOCACEAE. 



A Chhimiidomonas was found in abundance in the water of an old 

 tank, near Trott's Pond, Aug., Collins, but we have not been able to 

 determine the species. 



Family TETRASPORACEAE. 



Tetraspora Link. 



*T. lubrica (Roth) Agardh, L824, p. L88; Collins, 1909, p. 139, 

 fig. 26;1 Ulva lubrica Roth, L806, p. L68. Od dead leaves in ditch In 

 Devonshire Marsh, Dee., Collins. 



