JLMOJTG STilPLE SA.RCOI>E ORGANISMS. 



279 



the aquatic A. vulgaris, to be referred to in the sequel, has also 

 been discovered by Greeff. He names it A. arenaria. 



To Cienkowski we are indebted for the discovery and inves- 

 tigation of another very simple sarcodic organism to which he has 

 given the name oi Lalyrinthulea*. 



He found it among the lower algae which cover the piles in the 

 harbour of Odessa, where it is represented by two species, which 

 he names L. vltellina (fig. 7 A) and L. macrocystis (fig. 7 B, C). 



Fig. 7 



Labyrinfhulea vitellina. A. The entire organism, with the fusiform bodies 

 wandering over the filamentary network. I!. One of the fusiform bodies of L. 

 onaeroeystis still further magnified, showing its nucleus with nucleolus. 0. The 

 same, entering into the resting stage. (After Cienkowski.) 



It consists of a central mass of sarcode from which are given 

 off thread-like prolongations which divide and subdivide and 

 inosculate with one another, forming a net-like or dendritic ex- 



* " Ueber den Bau und die Entwictl. der Labyrinthulen," Arch. f. mikr, 

 Anat. vol. iii. 1867. 



24* 



