'!_! DESMIDR OF THE I'MTKH STATER. 



rounded. Zygospore square, angles rounded, sides usually 

 somewhat concave. 



1 Hameter 1 61 9 . 



Found floating, in families, in gelatinous scum, mountain 

 pools. 



M. \ik rococcum, Kg. Plate III. fig. 10. 



Cells oval <>r elliptical, about twice as long as wide, ends 

 sometimes slightly narrowed and rounded. 

 I Hameter <i-l 1 u. 



I Bually in gelatinous masses on old wet wood, timbers of 

 sluices, etc. 



M. Endlicherianum, Naeg. Plate [II, fig. II. 



Cells cylindrical, 3 4 times as long as wide, ends bluntly 

 rounded. 



I Hameter 9-1 I ". 



Occasionally intermingled with filamentous forms, in gela- 

 tinous gatherings. 



ML Clepsydra, W 1. Plate III. figs. 12-15. 



Living i>n ruck- ami mosses, swimming in a transparent, 

 sometimes light-green jelly; cells obtusely truncated, rounded 

 at the ends, 2 3 timet! longer than broad ; chlorophyl lamina 

 axillary, mostly indistinct, often wanting; endochrome light 

 green ; nucleus generally distinct ; zygospores subjuscous, either 

 globose or of an irregular form, somewhat resembling that of 

 an hour-glass; external coal irregularly excavated and sulcate. 



I Hameter given by the author is ; ;;,,". this won Id be .001 7-i 

 I". ". Evidently an error, the plant cannot i>c so large. 



Tin- author adds, "This Bpecies was found near ("lichen 

 Hills, growing amid mosses on the rocky juttings over which 

 the water was dripping. It occurs as a rather firm, trans- 

 parent jelly, mostly of a light greenish tint in which the cells 



arc often placed quite thickly. 



ms, SPIROTAENIA, Breb. 

 Plate III. figs. 16-22. 

 ( Jells straight fusiform, single or aggregated in a gelatinous mucus ; 

 m.t constricted in the middle, ends found. Chlorophyl arranged in 



one or more spiral lamina on the inner surface of the wall. 



