16 



ORCHESTIID.^. 



AMPHIPODA. 



SALTATOItl.l. 



ORCHESTIJDJi. 



TALITRUS LOCUSTA, Linnaeus? 

 {The Sand-Hopper.) 



Specific character. Supeiior antennas only reaching to half the length of 

 the penultimate joint of the peduncle of the lower. Last joint of the 

 peduncle of the inferior antennae nearly twice as long as the penultimate. 

 First pair of gnathopoda robust and powerful. Second pair of gnathopoda 

 feeble, membranaceous, terminating in an imperfectly-formed sub-chelate 

 hand ; dactylos small and remote from the extremity of the propodos. Pos- 

 terior pair of pleopoda very short. Telson rudimentary. 



Length, half to three quarters of an inch. 



Cancer Locusta, 



LiKN^us, Fauna Suec. No. 2042?* Syst. Nat. 

 ii. 1055, and Edit. Turton, vol. iii. p. 760 

 (1806). 



* The descriptions of the species of Amphipocla given by tlie earlier carci- 

 nologists are by no means sufficiently precise to allow satisfactory identifica- 



