320 Prof. M. Schultze on the Organization 



washed, I had kept alive since the autumn of 1857 a small 

 number of Gromice [G. Dvjardinii), Miliolidce, and Rotalida, 

 In June 1859, after the bottle had been strongly agitated by my 

 journey performed a little while before from Halle to Bonn, and 

 then stood for some weeks closely stopped, I observed, amongst 

 innumerable Bacillarice which coated the inner surface of the 

 bottle, some brownish-yellow bodies, which were recognized with 

 the lens as small Rotalidce. These had not previously occupied 

 these spots, but now, as was shown by several days' continuous 

 observation, either adhered quite immoveably, or changed their 

 point of adhesion, which had been surrounded by a black ring 

 on the outside of the glass, only by portions of a line. The size 

 of the animals was about |th of a line. I detached one of the 

 animals by means of a hair-pencil (which was not effected with- 

 out considerable force), cleaned it, by repeated brushing, from 

 the adherent small BaciUarice, and could then distinctly recog- 

 nize its form, especially by direct light. It was a Ilotalide, and is 

 best placed in the genus Rotalia. Threads were not emitted 

 from its surface even after long watching. The yellowish-brown 

 contents, especially of the larger chambers, exhibited a peculiar 

 coarsely granular consistence, observable even with a strong lens : 

 the true nature of this could not be ascertained, on account of 

 the opacity of the shell. I then proceeded to break up the shell, 

 in which I counted ten chambers, with needles, and was not a 

 little astonished when, after detaching the first fragments of the 

 shell, small three-chambered Polythalamia made their appear- 

 ance, of which, after crushing and breaking up the mother as com- 

 pletely as possible, from twenty to thirty were brought to light. 

 The whole of the small Polythalamia were of equal or nearly 

 equal size, and consisted of three, mutually adherent, nearly 

 globular chambers, of v/hich the first and innermost was the 

 largest and brownish-yellow, filled with large pigment-vesicles 

 resembling fat-globules, and the other two were colourless. 

 Their shell appeared very thin and brittle, containing calcareous 

 matter : no special structure, such as regularly arranged pores, 

 could be detected in it. The artificial birth appeared to have 

 been too early for the young animals ; for, although they were 

 watched for hours, no emission of processes was observable in 

 them. 



Of course I waited with impatience to see what would happen 

 with the other Rotalidce which were left adhering to the glass. 

 They were subjected to a strict check, and daily examined 

 with the strong lens ; and having been struck by the coarsely 

 granular consistence of the contents of some, I had the satis- 

 faction of observing in the neighbourhood of two of them 

 the sudden appearance of an accumulation (at first dense, and 



