BY INFERIOR ORGANISMS. 117 



Rotifer which he has named Synchata Baltica, 

 indicating that it is found in the Baltic Sea. 

 The naturalist Focke has since found this re- 

 markable little being in the lagune of Venice. 



Ehrenberg has described the following species 

 of self-luminous Infusoria existing in the Baltic : 

 Prorocentrum micans, an oval-shaped animalcule 

 with a long cilium, and containing many trans- 

 parent nucleoles (fig. 16) ; Peridinium Michaelis, 



Fig. 16. 



P.micans, P.fusus, P. f urea, P. acuminatum, Syn- 

 chata Baltica, and a species of Stentor (S. igneus?) . 

 Peridinium Michaelis (fig. 1 7), named after the 

 distinguished naturalist already alluded to, is not 

 unlike a very minute Florence flask filled with 

 plums, standing upon two legs, and hav- 

 ing a ciliated belt round its middle. It 

 is perfectly invisible to the naked eye. 

 The other species are very odd-look- 

 ing creatures, which it is impossible to 

 describe here. Flg - 17> 



