PALMELLA. 193 



PALMELLA HYALINA, Breb. 



Thallus irregularly expanded, gelatinous, green, cells 

 minute, crowded ; tegument almost homogeneous with the 

 gelatinous thallus, very soon diffluent. 



Diameter of cells, 0.75-1.00 //. 



Syn. Coccochloris hyalina, Menegh. 



Pools of stagnant water. 

 Plate CLXII, fig. 6, a well -filled part of thallus. 



PALMELLA MOOREANA, Harv. 



Thallus at first somewhat globose, tuberculate, dark green, 

 gelatinous, firm; cells nearly equal, elliptical, lighter or 

 darker green. 



Liameter of cells, 5 p. by 8 yu long. 



The thallus at first firm and floating ; diffluent with age ; 

 the cells often found 011 wet ground, marshes ; probably the 

 same as Aphanothece prasina, A. Br., and PalmeUa dura, 

 Wood. 



Syn. Coccochloris Mooreana, Hass. 



Plate CLXII, fig. 11, small section of thallus. 



PALMELLA UVAEFORMIS, Kg. 



Thallus thick, gelatinous, soft, surface irregular, rather 

 bright green ; cells small oblong, elliptic or globular, often 

 variable in size; membranes firm; cell contents chloro- 

 phyl green. 



Diameter of cells, 3-7 yw. 



Wet timbers about mills. 

 Syn. Cagniardia uvaeformis, Trevis. 



Plate CLXII, fig. 13, section of a large thallus. 



PALMELLA MINIATA, Leibl. 



Thallus indefinite, gelatinous, surface irregularly tubercu- 

 late, often changes to yellow or reddish color ; cells spherical 

 with membrane firm ; contents orange, or green. Two 

 forms, the one with cells very irregular in size, from 4-40 ^ ; 

 the other with cells equal, about 14 /^ in diameter. 



Syn. Merettia miniata, Trevis ; P. aequalis, Naeg. 



Moist and wet earth. 

 Plate CLXII, fig. 10, the form Aequalis, Naeg. 



