334 CRUSTACEA. 



Genus CLYDONIA, Dana. 



Corpus elongatum paulo depressum. Abdomen Q—7-articulatum. Oculi 

 parvi. Antennce duce elongate styliformes, rectce, rigidce, articulo 

 brevi basali et altero longissimo subidato obsolete multiartioidato in- 

 structed. Pedes tenues, 6 postici filiformes, quintis lemgissimis. 



Body elongate, somewhat depressed. Abdomen six to seven-articulate. 

 Eyes small. The two antennae long styliform, straight, consisting 

 of a short basal joint and a long, rigid, subulate, extremity, obso- 

 letely multiarticulate. Feet slender; six posterior long filiform; 

 fifth longest. 



The long, straight, and rigid antennae of the species, and the long 

 slender legs, are unlike what is elsewhere found in the Gammaridea. 

 Owing to the very long legs, flexed as they are for walking, the species 

 have some general resemblance in habit to a Mantis. The four an- 

 terior legs are the shortest, and have no proper hands. 



These animals were procured in the open ocean, one species in the 

 Atlantic, and the other in the Pacific. The name of the genus is 

 from *Xv2m y a wave, and alludes to the place of occurrence of the 

 species. 



1)ana, Am. J. Sci. £2], ix. 1850- 



Cltdonia gracilis. 



Antenna? duoe fere corporis lotigitudine, subulatw. Oculi parvi, lenti- 

 culis 9. Styli caudales tenues, primi ultimique secundis longiores, 

 ultimis medio ramum brevem acutum ferentibus. Pedes quinti corpore 

 non breviores, artwulo primo longissimo infra minute spinoso, apice 

 spinose producto; septimi quintis pins dimidio brevioi'es. Abdominis 

 segmenta 3 antica latere acuta, angxdo postico subtruncato. 



Two antennae about as long as the body, subulate. Eyes small, with 

 nine lenses. Caudal stylets slender; the first and last longer than 



