ISOPODS OF NORTH AMERICA. 127 



of the width of the segment, is widel}' emarginate in the middle, the 

 angles being obliquel}^ truncate, and armed with two robust spines 

 (the inner one much h)nger than the outer one). 



The uropoda extend a little l)evond the abdomen; they are large, 

 formed almost as in the male of E. elegantula^ with the exterior mar- 

 gin of the inner branch, however, a little more curved. The color is 

 brown, covered with scattered l)lack. irregular, and branching spots. 



The male appendix does not extend be3^ond the inner branch, is 

 strongly dilated at the apex, the apex being widely rounded and 

 entire." 



«The above description is adapted from the following one of Hansen's: 



Diiiirn. Corpus paiilo plus quain triplo lougius qnani latius; cauda truncuin 

 lonjiitudine subipquaus. Clypeus areani totaui inter palpos mandibularum occupans, 

 in cornu longuni productus. Antennulfe articulo primo flagelli circiter duplo et 

 diniidio longiore quam articulis 3 ceteris cunctis. Antenna> articulo ultimo pedun- 

 ouli plus duplo longiore quam articulo penultimo. Epiinera omnia angulo posteriore 

 in processum conicum, acutum i)rodu('to. Segmentuni ultiinum caudse margine 

 posteriore jiaulum ultra tertiam ijartem latitudinis segnienti explente, in medio late 

 emarginato, angulis in obliquum truncatis, spinis binis (interiore muito longiore 

 (juam exteriore), robustis, afRxis ornatis. Uropoda caudam paulum superantia. 

 Long, maris adulti 9 nun. 



E elegantuUi' sat similis. Corpus minus angustatum (juam in mare E. dcgantuLv; 

 truncns sat multo latior et non brevior quam cauda. 



Frons ante perpaulum emarginatus, processu medio evanido. Oculi ut in mare 

 E. elegantiiLr. Antennuhie paulo crassiores quam in femina/i^. eleganiulx; pedunculus 

 articulo primo angustiore, ante articulum secundum manifesto prominente, articulo 

 tertio paulo latiore (juaui longiore; tlagellum setis sensilibus sat numerosis, breviori- 

 bus instructum. 



Antenn;c truncum ])aulum superantes; tlagellum c. 20-24 articulatum; articulis 

 exterioribus ex parte majore longis, seta apicali nulla. 



iSegmenta anteriora trunci stria transversa brevi, media, profunda ornata; seg- 

 menta 4 posteriora saltern stria transversa longa instructa. 



Epimera structura in diagnosi commemorata a speciebus omnibus mihi cognitis 

 valde diversa; epimera sexti paris processu conico inter omnes lon^issimo; epimera 

 septimi paris processu inter omnes brevissimo. 



Pedes parium trium anteriorum fere ut in E. elegnutula, setis tanien pluril)us 

 instructi. 



Pedes parium trium posteriorem perpaulo breviores et latiores quam in E. elegan- 

 tulii; setis tauien pluribus instructi. Pedes septimi paris articulis tertio-sexto in latere 

 iuferiore ad marginem interiorem versus spinis multis brevioribus instructi, ad margi- 

 nem exteriorem versus setis multis ornati; articulus quintus perpaulo brevior quam 

 sextus, multo longior quam quartus; articulus quartus paulo longior quam latior. 



Segmentum ultimum caud* ad basin versus impressione media breviore et pro- 

 funda et utrinque excavatione laterali j)rofunda et sat magna iustructum; impressio 

 media in fundo l)icarinata; reliqua in diagnosi commemorata. Uropoda majora, 

 fere ut in mare E. degtmtuhv formata, margine exteriore rami interioris tauien pau- 

 lum incurve. 



Color brunneus, maculis irregularibus et ramosis nigris minus crebre conspersis. 



Appendix masculina ranuim interiorem minus superans, ad apicem versus valde 

 dilatata, apice late rotundato, integro. — Hansen, Vidensk. Selsk. Skr. (6), V, 1890, 

 pp. 367-369. 



