Gomphosphaeria aponina var. gelatinosa Prescott 



in Prescott, Silva, & Wade 1949, p. 89 



PI. 106, Fig. 10 



Cells pyriform, arranged in 2's and 4's in multiple, irregularly 



lobed or vermiform colonies, each group of cells entirely or partially 



enclosed by a thick gelatinous integument, the radiating gelatinous 



strands common to the typical form not in evidence; cells 3.7-4/a in 



diameter, 6-7 A/x long. 



This variety should be compared with Gomphosphaeria aponina 

 var. multiplex Nygaard. 



Plankter; in soft water lakes. Wis. 



Gomphosphaeria lacustris Chodat 1898, p. 180 

 PI. 106, Fig. 9 



Cells spherical or sometimes reniform, arranged in clusters of 

 4-8 individuals at the ends of fine gelatinous strands, clusters at 

 some distance from one another in copious gelatinous envelopes; 

 cells 1.5-2.4/x in diameter. 



This species is sometimes abundant as a euplankter, but it is more 

 commonly found among other algae in the tychoplankton. Although 

 generally distributed, this species seems to prefer hard or semi-hard 

 water lakes. It should be compared with Coelosphaerium Kuetzing- 

 ianum. 



Euplankter. Mich., Wis. 



Gomphosphaeria lacustris var. compacta Lemmermann 1900, p. 339 

 ^; PI. 106, Fig. 8 



Cells oblong, very compactly arranged within a wide, gelatinous 

 envelope, 1.5-2.0;a in diameter, 4-6/a long. 



Rather common in the euplankton of both hard and soft water 

 lakes. Wis. 



GLAUCOCYSTIS Itzigsohn, No. 1935 in Rabenhorst 1866, 

 Die Algen Europas; emend. Geitler 1923a 



A colony of 4-16 cells inclosed by the persistent mother cell wall 

 (as in Oocystis); cells spherical or ellipsoidal, containing numerous 

 vermiform or sometimes irregularly shaped chromatophore-like 

 bodies which may be either peripheral or somewhat radiating and 

 axially arranged. 



This interesting plant is now interpreted by most students of algae 

 as a colorless member of the Oocystaceae ( Chlorophyta ) containing 

 protoplasts which belong to the Chroococcaceae. It is a little- 



[ 473 ] 



