BRITISH STALK-EYED CRUSTACEA. 361 
which it possesses. The direct use of this peculiar covering 
appears somewhat doubtful, but its suitability to form a nidus for 
the growth of forms which tend to conceal the animal probably 
afford the true explanation. The “hairs” when examined micro- 
scopically consist apparently of a fibrous mass distributed very 
equally over the carapace and of an equal height. Upon the 
tubercles of the carapace, however, there are tufts of hair of a 
different structure ; these latter are not fibrous, and are, moreover, 
club-shaped and curved, resembling in form the antenne of the 
lepidopterous insect, Zygena filipendula. If a vertical section be 
taken through the carapace, the hairy covering will appear like a 
multitude of pillars supporting a platform; this platform is formed 
SrrcimENs oF Pisa GipBstl wiTH SPONGES ATTACHED. 
(See p. 363.) 
_ by the ends of the fibres becoming matted together with objects 
with which they come in contact and to which they readily adhere. 
Amongst those on the stage of our microscope were many grains 
of sand and large quantities of spicule, &c. All this accumulation 
affords an excellent lodgment for the spores of various marine 
growths, and we shall close our account of this species with a 
description of a few of the most remarkable of these in Mr. 
Carrington’s collection. The hair-like processes on the sternum 
are on a whitish ground, which gives a curious effect, the hairs 
being brown. When dry they are easily broken away and show 
3A 
