GAMMARUS. 185 



South coast of England (Dr. Leach) ; Plymouth (Mr. 

 Spence Bate) ; Belfast (Mr. Thompson). 



Gammarus brevicaudatus, Edwards. — Lower antenna 

 not reaching to the end of the peduncle of the upper. 

 Last pair of caudal stylets extremely short. 



Plymouth (Mr. Spence Bate). 



Gammarus grossimanus, Montagu. — When alive, pale- 

 yellow, sometimes mottled with pink. Hands of second 

 pair of jaw-feet large, ovate, compressed ; the fangs long 

 and hooked, folding on the edge of the hand. Length five 

 lines. 



Rocky shores; common in pools left by the receding tide. 



Devonshire and Berwick, Plymouth. 



Gammarus in^equimanus, Spence Bate. — Second pair 

 of jaw -feet with the left hand four times as large as the 

 right. A dorsal spine on the eleventh segment after the 

 head, and two smaller placed laterally on the next. 



Polperro (Mr. Loughrin). 



Gammarus ? pallidus, Spence Bate. — Upper antenna 

 shorter than the lower. Hands large, with last joint well 

 developed and fringed internally with teeth. 



Plymouth (Mr. Spence Bate). 



