BY INFERIOR ORGANISMS. LZ 
Rotifer which he has named Synchata Baltica, 
indicating that it 1s 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); Peridiniwm Michaelis, 
Fig. 16. 
P.imvicans, P. fusus, P. furca, P. acuminatum, Syn- 
chata Baltica, and a species of Stentor (S. igneus?). 
Peridinium Michaelis (fig. 17), 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 4 = 
is perfectly invisible to the naked eye. ae 
The other species are very odd-look- 
ing creatures, which it is impossible to 
describe here. phere 
