ELISHA MITCHELL SCIENTIFIC SOCIETY. 3 



Closterium moniliferum, Ehrenberg. 

 Closterium Leibleinii, Kuetzing. 

 Closterium areolatum, Wood. 

 Closterium lunula, Ehrenberg. 

 Closterium lineatum, Ehrenberg. 



Closterium striolatum, Ehrenberg. Var. elongatum, Raben- 

 horst. 



Closterium rostratum, Ehrenberg. 

 Closterium dianse, Ehrenberg. (?) 

 Closterium gracile, Brebisson. 17 diameters long 

 Closterium obtusum, Brebisson. 

 Closterium acutum, Brebisson. 

 Closterium acerosum, Ehrenberg. 



Closterium nasatlim, Nordstedt. (?) Not quite sure of the species, the 



-ides of the suddenly contracted ends not being parallel, and the cell being 7 diameters 

 long. 



Docidium crenulatum, Rabenhorst. 

 Docidium trabecula, Naegeli. 

 Caloeylindrus connatus, Kirchner. 

 Caloeylindrus connatus. Var. minor, Nordstedt. 

 Caloeylindrus minutus, Kirchner. 

 Caloeylindrus Thwaitesii, Ralfs. (?) 21 micros. 



Cosmarium ovale, Ralfs. (?) Margins almost destitute of granules; ends 



.somewhat truncate. 



Cosmarium punctulatum, Brebisson. 



Cosmarium Pvramidatum, Brebisson. 



Cosmarium cucumis, Corda. (?) 32 micros. 



Cosmarium botrytis, Meneghini. 



Cosmarium botrytis. Var. tumidum, Wolle. 



Cosmarium undulatum, Corda. Var. crenulatum, Wolle. 



32 micros. 



Cosmarium notabile, Brebisson. 21 micros 



Cosmarium speciosum, Lundell. 32micros 



Cosmarium portianum, Archer. 



Cosmarium orbiculatum, Ralfs. 



Cosmarium Schleiphackeanum, Grunow. lomicros. 



Cosmarium pseud obroomei, Wolle. 



