Freshwater Algse and Schizo'phyeese. By A. W. Bennett. 3 
Chroococoace^. 
Chroococcus turgidus Nag., H. 
Aphanocapsa virescens Rbh., H. 
Merismopedia glauca Nag., H, D. 
OsOILLARIACE^. 
Oscillaria tenerrima Ktz., H. 
„ princeps Yauch., H. 
ScHIZOTHRIX ANGLICA n. sp., H. Fig. 2. 
Trichomes very long and slender, unbranched, about 5 ya in 
diameter; two or more inclosed in a common mucilaginous sbeatb. 
Sbeatb 6-10 times as broad as tbe tricbomes, pale yellow, diffluent 
(ultimately brown ?), somewhat lamellose. This interesting genus of 
Oscillariacese is new to Britain ; tbe submarine species, Schizothrix 
Creswellii, described by Harvey, and found by bim, and again recently 
by Parfitt, at Sidmouth, being referred by Tburet, no doubt correctly, 
to Inactis. Tbe organism was found sparingly in a bog-pool near 
Lyndburst. It does not seem to me to agree fully with any species 
bitberto described, differing from them in tbe extreme fineness of tbe 
tricbomes. It comes nearest to 8. Mulleri Nag., apparently known 
only from tbe neighbourhood of Zurich ; but may very probably be 
identical with Basygloia amorpha Tbw., found in England by 
Berkeley, tbe descriptions of which are very imperfect. Bornet 
{in litt.) is inclined to sink both Schizothrix and Dasygloia in 
Microcoleus, characterized by tbe inclusion of a number of tricbomes 
in tbe same general sbeatb. They present the peculiarity of tbe 
narrowing of tbe common sbeatb at tbe lower end into a kind of 
tube, from which portions of tbe tricbomes escape in the form of 
hormogones. 
SCYTONEMACEJE. 
Stigonema minutum Hass., H, D. 
Scytonema figuratum Ag. (S. calotbricboides Ktz.), H. 
Figs. 3, 4. 
Sbeatb translucent, pale yellow throughout, about 25 jjl in dia- 
meter. Tricbomes green, composed of pseudocysts, about 4 fju broad, 
and about as long as broad, or longer in the lower part of tbe 
trichome ; beterocysts elliptical, about twice as long as broad, 
20 X 10 ya. Branches always geminate, usually short, and of some- 
what less diameter than tbe main filament. A slenderer species than 
8. myochrous Ag., which has been recorded from Cornwall by 
Marquand. Bogs, Lyndburst. A widely distributed species, not 
mentioned in Cooke’s ‘ British Freshwater Algae,’ stated to have 
occurred in England by Bornet and Flahault on the authority of 
Berkeley, but without any locality. 
B 2 
