570 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiii. 



(''. Last abdominal segment trapezoidal or subcordiform, narrower at its 

 truncate apex. External branch of the uropoda inserted in the inner 

 post-lateral angle of the basal joint. Coxopodites of the first and 



second segments distinct (underside) 69. PscudarmadlUo. 



d'. Eyes large. First thoracic segment with coxopodites well develo pe 

 and distinct on the up]#r surface, where they form on each side of the 

 segment a very large marginal border. Caudal segment obtuse and 

 rounde<l at apex. Basal joint of uropoda occupying all the space 

 between the caudal segment and preceding one. Inner branch does 

 not reach the apex of last segment ; outer branch terminal, styliform, 



and very small 70. Memnnadlllo. 



(■^. Flagellum with three joints. Coxopodites of first segment usually distinct on 

 underside. Terminal segment of body very short, rounded posteriorly. 

 External liranch of the uropoda inserted in the inner post-lateral angle 

 of the quadrangular basal joint, and extends downward. Inner 

 branch reaches much beyond terminal segment of body. 



71. SphaToniscua. 



h'. Flagellum of external antennre with a single joint only. Coxopodite distinct 



on first segment (underside). External liranch of the uropoda inserted 



at inner post-lateral angle of basal joint 72. Haplanimdillo. 



a'. Outer branch of uropoda large, flattened lamellar, inserted at apex of basal joint. 



73. ArmadlUidhun. 

 68. CUBARIS Brandt. 



.\X.VLYTirAL KEY TO THE SPECIES OF CrBARIS. 



a. Body tuberculate. 



b. Second thoracic segment without a distinct coxopodite. 



c. Coxopodite of first thoracic segment hardly perceptible as a very small pro- 

 cess below the leg. Prosepistoma of head with a shield-like con- 

 vexity. Apex of telson half as wide as basis. Endopodite of the 

 uropoda extending one-half the length of the telson. 



156. Oubaris temdpunctatus (Dollfus). 

 c\ Coxopodite of first thoracic segment hardly perceptible, only a feeble ridge. 

 Prosepistoma of head nearly plain. Apex of telson one-third nar- 

 rower than basis. Endopodite of the uropoda extending two-thirds 



the length of the telson 157. Oubaris depressus ( Dollfus) . 



?/. Second thoracic segment with a distinct coxopodite (underside). 

 c. Coxopodite of the first thoracic segment distant from the edge, crested, and 

 ended by a tooth-like diverging process. 



158. Cnbaris vlflcola (Dollfus). 

 c\ Coxopodite of the first thoracic segment not distant from the edge and not 

 cre.sted. 

 d. Coxopodite of the first thoracic segment distinct along the entire length 

 of the edge (underside). 

 ('. Coxopodite of the first segment divergent on the half hind part. Cox- 

 opodite of the second segment forming a tooth-like diverging process. 



159. Oubaris silvdravi (Dollfus). 

 e'. Coxopodite of the first segment not divergent. Coxopodite of the sec- 

 ond segment large, square-shajjed... 160. Oubaris perlat us (Dollfus). 

 d^. Coxopodite of the first thoracic segment not distinct along the entire 

 length of the edge; 

 e. Coxopodite of the first segment small, dentiform, and very unequally 



cleft 161. Oubaris nairiuus Brandt. 



e'. Coxopodite of the first segment not dentiform, subequaPy cleft. 



162. Oubaris eiiictus {DoUius). 



