PORCELLIO DILATATUS. 479 
joints of nearly equal length. The lateral lobes of the 
front of the head are large, and curved rather outwards ; 
they extend rather beyond the anterior angles of the 
first segment of the body, which, together with the two 
or three following segments, are marked with rather 
oblique and slender lines and rugosities. The terminal 
segment of the tail has the sides of the apical half 
nearly parallel, and the tip itself rounded. 
It is of an uniform slaty-grey colour, with faint 
irregular pale lines and spots indicating the chief 
rugosities. 
It is found amongst decaying grass and straw, and 
appears to be extremely rare. It crawls very slowly, 
and partially rolls itself into a ball. It is very brittle 
in its texture, a touch causing the limbs to fall off. 
Specimens are preserved in the British Museum, found 
by Prof. Kinahan, from the neighbourhood of Dublin. 
