1 4 I.I.IN- AND III 1;\ }.\ . 



Class myxophyceae 

 I'vmiia CHROO <>< i A< I'.AK. 



("hroococ( - \ geli. 



1. Cells 3-8 m diam., 1. C. membraninua, 



1. Cells 13-25 /* diam. 2. C. burgkha. 



*1. C MEMBRANINUS MeneglO Nageli, 1849, p. 46; P. B.-A., 

 No. 2151; Pleurooocctu membraninus Meneghini, L842, p. 34, PI. IV, 



fig. 1. In brackish pool near race course, Aug.; in ditch in South 

 Shore marshes, Sept., Collins. In the material from the locality first 

 named the cells were dividing rapidly, and average smaller than in 

 P. B.-A., No. 1201, about like Wittrock, Nordstedt & Lagerheim, 

 Xo. 153S. Sometimes the division of the cells goes on so much 

 faster than the separation of families that a mass resembling a 

 Microcystis is formed. 



_\ C. TUR(;ii)rs (Kutz.) Nageli, 1849, p. 40; Protococcus iurgidus 

 Kiitzing. 1 8 1 .">■■ 19, p. 5, PI. VI, fig. 1 . In gelatinous masses in hraekish 

 pools, and in films on decaying algae near Flatts Bridge, April, Collin-. 



Sv\ i;< iiocystis Sau vageau. 



* S. aquatilis Sauvageau, 1892a, p. ( 'XVI. On rocks near Hungry 

 Bay, April; in cave, Agar's Island, Aug., Collins. 



Synechoco* i era N Lgeli. 



S. LERUGINOSU9 Nageli, 1849, p. 56, PL L E, fig. 1. Among other 

 algae in brackish pool near race-course, Aug.] Collins. Cells about 



14 X 7 n, which is rather small for this species. 



Chroothu i. Hansgirg. 



I fells Beldom under 20 M diain. 1. C. Riehteriana. 



1. Cells not over 'A n diam. 2. C. cryptarum. 



1. ('. Rl( BTERIANA forma MARINA Hansgirg, L889, p. .">; P. B.-A., 



Xo. 702. Farlow; rather common od shaded stone work and on sides 

 of caves, < 'ollins. 



