SYNECHOCOCCUS. 325 



GLOEOTHECE CONFLUENS, Naeg. 



Stratum gelatinous, usually pale reddish yellow, or green- 

 ish j cells mostly single; sometimes two in a tegument, 11-2 

 times as long as wide before division ; later often nearly 

 spherical ; cytioplasm greenish, tegument wide, colorless. 



Diameter of cells, 1. 6-2.25 yw; with tegument, 9-10 /A 



On wet rocks. 

 Plate CCX, fig. 6. 



This and other forms of the genus are conditions in the 

 development of Sirosiphon and ftteytonetna. Compare Plates 

 CLXXXIV, CXC and CXCI. 



Genm 109, APHANOTHECE, BTaeg. 



i 



Cells longer than broad, near the last (Gloeofhece), but having 

 the teguments usually confluent, forming a rather firm gelatinous 

 body in which the cells are imbedded. 



APHANOTHECE PRASINA. A. Br. 



Thallus gelatinous more or less globose, tuberculose, size 

 of a cherry, usually floating, dark bluish green; cells 1-1-2 

 times as long as wide, aeruginous or light bluish green. 



Cells 4-6 j.i wide by 8-11 yu long. 



Syn. Coccochloris stagnina, ( West, and Wall. ) Bab. ; Apkctno- 

 thece Mooreana, Lagerh. ; Palmetto, Mooreana, Harv. See 

 page 193. 



Plate CCX, figs. 9, 10, a thai 1 us, and single cells. 



APHANOTHECE PALLIDA, Eab. 



Thallus gelatinous, soft, 1-6 mm thick, forming small 

 masses; light green with a tint of blue, cells elliptic, 11-3 

 times as long as wide, pale aeruginous. 



Diameter of cells, 3.5-8.0 //. 

 Syn. Palmella pallida, Kg. 



On wet, or marshy ground, Pennsylvania. 

 Plate CCX, figs. 7, 8, a thallus and individual cells. 



Genus 110, SYXECHOCOCCITS, Naeg. 



Cells elongated or cylindrical, membrane thin, singly, or in 

 series of two or more. 



