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DIVISION II. 
THE SESSILE-EYED CRUSTACEA. 
AMPHIPODA. 
This name was given by Latreille to this order, on account of 
the animals comprised in it having two lands of appendages, 
one for perambulation, the other for swimming. 
ORCSEBTIBJE. 
Genus, Talitkus. — Lair. 
First pair of antennm rudimentary, second long. First pair 
of legs strong and simple in both sexes, second pair small and 
feeble. 
Talitkus Locusta — Sand Hopper. — Zinntsus. 
Abundant on sandy shores above high-water mark, mostly 
under weed and offal. Dwelling in holes burrowed in the hot 
sand. In the summer they are abundant, in the winter they 
burrow into the sand. 
Genus, Okchestia. — Leach. 
Like Talitrus, but having the anterior two pairs of legs sub- 
chelate. The second large and powerful in the male, but slender 
and feeble in the female. 
Orchestia litiorea. — Shore Hopper. — Montagu, Lin. Trans, 
p. 9614 ,/. 4 . 
Stony and pebbly beaches, above high-water mark. Tolerably 
frequent on the shores of Plymouth Sound. 
Orchestia mediieeranea. — Costa, Rind dell accad. Sci. nap, V ' 
171 , 1856 . 
This species has not yet been recorded from Cornwall, but R 
reaches from the Mediteranean and the shores of the Crimoai 
and the northern coast of Ireland, and also from Wales. I f®® 
