THE ROCK TINTLET. 253 



I found tins tiny species in much eroded limestone from 

 a cavern at Oddicombe, Devon, associated with Edwardsia 

 carnea, in June, 1858. Having chiselled off many frag- 

 ments of the rock, I put them into glass jars of sea-water; 

 and in a day or two found Halcampa microps crawling up 

 the side of the jar, adhering by its inflated skin. In the 

 course of a day or two more, another and another appeared, 

 until five or six had come under my notice, most of them 

 adhering to the glass. They were active and locomotive, 

 moving along the surface with ease and comparative 

 quickness (at least ten times their length in a night), 

 adhering by any part of the hinder moiety of the column. 

 Very frequently they threw the anterior portion suddenly 

 round, like an irritated caterpillar ; and almost continually 

 constrictions were passing down in succession from head 

 to tail. 



They are very coy and very sensitive, retracting forcibly 

 and suddenly when alarmed. I attempted to feed them, 

 but only frightened them. 



The specific name is from fjuicpbs, small, and &>i/r, the 

 face. 



chrysanthellum. 



MICEOPS. 



Edwardsia. 



