396 



ISOPODA. 



NORM A LI A. 



IDOTEIDiE. 



IDOTEIDM. 



IDOTEA APPENDTCULATA. 



Specific character. Very narrow. Pereion with the hxteral margins angularly 

 produced, with the slender legs attached close to their edges. Pleon lanceo- 

 late, and apparently only one-jointed. 



Length, about an inch. 

 Leplosoma appcndiculaia. Risso, Hist. Nat. de FEur. Merid. vol. v. p. 107, 



Idotea appendiculata. 



Leptosoma lancifer. 



t. 4, f. 23. 



Milne Edwards, Crust, ii 

 B. M. Cat. Brit. Crust. 

 Brit. Crust. 224. 



Leach, MSS. in Brit. Mus. 



. p. 135. White, 

 p. QQ. Pop. Hist. 



Our figure of this species is drawn from Dr. Leach's 

 specimen from Sidmouth, contained in the British Museum 

 collection. The body, somewhat irregular on its upper 

 surface, is narrowed and considerably flattened, with the 

 segments strongly produced and angulated at the sides, 

 the angles being formed (except in the first segment) by 

 the exposed epimeral or coxal joint of the legs. The 



