184 
HISTORY OF BRITISH CRUSTACEA. 
across each segment, and a row of yellow spots along each 
side. Eyes oblong, red, running backwards. 
Sea-coast near Berwick ; rare. 
Gammarus fluviatilis. Fresh-water Screw. — Eyes 
ovate; three last joints of body smooth; lower pair of 
caudal fins rather the longest ; legs rough. 
Bound in fresh- water ; cannot leap, and dies very soon 
when taken out of water. 
Gammarus gracilis, Kathke.— Upper antenna much 
longer than the lower. Last pair of hind false feet with 
the stylets unequal. 
Plymouth (Mr. Bate). 
Gammarus palmatus, Montagu. — Eirst jaw-foot with a 
very small hand ; second, with hand very large and square ; 
last joint scimitar-shaped. 
Devonshire (Montagu) ; Plymouth (Mr. Spence Bate). 
Gammarus Othonis, Edwards. — Hands subequal, long 
and narrow towards the extremity. The last of the false 
feet with the stylets equal. 
Plymouth (Mr. Spence Bate). 
Gammarus longimanus, Leach.— Second hand much 
larger than the first, very long, and not narrowing towards 
the extremity ; last caudal stylets equal. 
