46 
Guide to Crustacea. 
Tablc-i 
No. 7. 
species are exceedingly common all round our coasts. They are 
almost terrestrial in their habits, burrowing in the sand above 
high-water mark, and sometimes at a little distance from the sea. 
The two are often found together, and it is perhaps incorrect to 
imply that they are distinguished in popular speech, but Talitrus 
is stated to be more common on sandy beaches, while Orchestia 
is often found among rocks. 
More typical representatives of the Gammaridea, however, are 
Fig. 28. 
Aegina spinosissima, one of the Caprellidae, slightly reduced. 
[Table-case No. 7.] 
the numerous species of Gammarus, of which some live in the sea 
and others, like the very common Gammarus pulex of this country, 
in fresh water. Specimens and a drawing of Gammarus locusta 
(Fig. 27) are shown in this case and a coloured drawing of the 
same species, from life, is hung in Wall-case No. 6. 
Of the other Gammaridea exhibited, it need only be said that 
some, like Eurythenes gryllus and Stegocephalus ampulla, show 
the large size reached by some species in Arctic Seas, where they 
swarm in extraordinary profusion ; that Acanthogammarus god- 
leivskii is one of a host of remarkable species, all closely related 
