THE PRESERVATION OF CHLOROPHYCEAE 



229 



TABI.i; III— Continued 



Chaetophoraceae 



PBESEBVATIVE 



NW 



Oedogoniaceae 

 Oedogonium Link . 



Bulbochaeie Ag 10 % CLP 



SIPHONOCLADL\LES 

 Cladophoraceae 

 Cladophora (Kg.) 



Wille 10% 



SIPHONALES 

 Vaucheriaceae 



Vaucheria D. C 10 % CLP 



CLP 



PLAB- I 

 U0LY8IS 



Draparnaudia Bory. . . 



10 



% 



CLP 





Chaetophora Schranck 



12 



% 



CLP 



+ - 



Stigeoclonium Kg 



10 



% 



CLP 





Slercococcus Kg. 











{Gongiosira Kg.).... 



10 



cr 



/O 



CLP 



+ + 



Protoderma Kg 



10 



cr 

 /O 



CLP 





Aphanochaetaceae 











Aphanochaete A. Br.. . 



10 



% 



CLP 





COLEOCHAETACEAE 











Coleochaete Brcb 











— — green 



green 

 green 



+ 



I _ 



Slight plasm 

 old cells. 



dark green 

 green 



green 



bright green 

 green 



+ + green 



green 



The results obtained show that the specific preservative for 

 every alga should be experimentally determined. Table III is a 

 summary of the results obtained with a large number of genera 

 preserved in 10 % copper-lacto-phenol. The arrangement of the 

 genera is that of Wille. When other concentrations were used 

 and better results obtained, mention is made of the fact. 



The results given above also bring out the fact that large volumes 

 of the copper-lacto-phenol mixture should be used for the preser- 

 vation of algae. To be on the safe side, there should be about 

 ten volumes of the solution to one of the alga. 



Copper-lacto-phenol mixture is not a good preservative of 

 color in the blue-greens and the Diatoms. In the latter the brown 

 color of the chromatophore is changed to a bright green. In some 

 species of Melosira the yellowish-brown color is retained. When 



'° Wille, X. Conjugatae und Chlorophyceae. Engler und Prantl, Nat. Pflanz. 

 Nachtrage ziim T. Th. 2, .\bt. 236 und 2.37. Lief. 241 und 242, 1910. 



