I'HK C(EI>OMTC FLUID IN ACANTHODRILIDS. f)73 



Sulphuric acid reacts at first like the preceding; but the 

 globules are dissolved^ leaving a coagulated network (? cyto- 

 plasmic) pervading the cell, whose pellicle, however, per- 

 sists. 



Acetic acid (glacial) does not dissolve the globules, which 

 are equally insoluble in oxalic acid. 



[The slide is heated over a bunsen till bubbles appear, and 

 the thin film of fluid boils more or less fiercely.]. 



When caustic potash (70 per cent.) reaches the cell, the 

 globules rapidly disappear one after the other; they are, in 

 fact, instantaneously dissolved. 



Ether dissolves the globules. 



Absolute alcohol, when poured suddenly and in consider- 

 able quantity on a cover-slip, leaves many of the globules 

 undissolved; but when it is run in below the cover, I have 

 seen the globules disappear. 



3. The Lamprocytes are the most abundant of all the 

 elements m the fluid (PI. 41, fig. 6). They resemble in size 

 and general outline the preceding eleocytes, but are, as a 

 matter of fact, rather flattened — as can be seen as they roll 

 over in a current of reagent ; the oval or roundish 

 outline is more or less irregular, and I believe the cells are 

 capable of a certain degree of difflueuce. At any rate, they 

 are very readily capable of being compressed, and of again 

 resuming the normal form. 



The cytoplasm — bounded by a definite pellicle — is clear 

 and transparent ; it is crowded with clear, colourless, circular, 

 vacuole-like structures, most of which contain a small but 

 very highl^r refringent body. This "^ granule'^ differs 

 chemically as well as physically from the "^ vacuole,'^ and 

 each differs from the globule of the eleocyte. 



I have used the expression " vacuole-like,^' for I feel doubt 

 as to whether we are here dealing with true vacuoles in the 

 cytoplasm ; when the cell is broken these structures are freed 

 and retain their form. They seem to be of firmer consistency 

 tliau the cy toplasui, but have no definite " membrane ; " each 



