THE ROCK PINTLET. 
or:f> 
I found this 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 /x/Acpo?, small, and the 
face. 
chrysanthellum. 
MICROPS. 
Edwards- ia. 
