IO4 HISTOLOGY 



While attractive, this hypothesis is not grounded upon sufficient 

 knowledge and should not be too seriously entertained. 



Technic. The sponge material had best be fixed in pure watery 

 solution of sublimate and, after the mercury compounds have been 

 taken out with potassium iodide, stained with weak alum carmine 

 progressively, that is, stained slowly with a very weak solution of the 

 stain, so that a subsequent decolorization is not necessary. 



LITERATURE 



ENTZ, G. "Die elastischen und contractilen Elemente der Vorticellinen," Math. u. 

 Naturwiss. Berichte a. Ungarn, X, 1-48. 



