GO 
Guide to Crustacea. 
Tablo^casG front, or rostrum, is not united with the epistome. The sixth pair 
of abdominal appendages (uropods) are rarely absent. The last pair 
of legs are reduced in size and the last thoracic sternum is movable. 
The Sub-order is divided into three tribes, of which the first, 
Paguridea, includes the Hermit-Crabs and their allies. With few 
exceptions, the most important of which are the Coco-nut Crab, 
Birgns, and the family Lithodidae, the members of this tribe have 
the abdomen soft, not distinctly segmented, and spirally twisted in 
Fig. 39. 
The common Hermit-Crab, Eupctgurus bernharclus , in the shell of a 
whelk, reduced. [Table-case No. 12.] 
adaptation to the habit of living in the empty shells of Gasteropod 
Molluscs. 
The marine Hermit-crabs, forming the family Paguridae, nearly 
all live in shells, and very often the outside of the shell gives 
attachment to Sponges, Hydroid Zoophytes, or Sea Anemones, 
between which and the Hermit there may exist more or less definite 
relations of “ commensalism.”- In the case of Paguropsis typicci, 
here exhibited, no shell is carried, but the abdomen is protected by 
a cloak of living sea anemones held in position by the hinder 
legs of the crab. The commonest British species, Eupagurus 
bernhardus (Fig. 39), and one of the largest representatives 
