ISOPODS OF NORTH AMEKICA. 127 



of the width of the segment, is widely emarginate in the middle, the 

 angles being obliquely truncate, and armed with two robust spines 

 (the inner one much longer than the outer one). 



The uropoda extend a little beyond 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 black, irregular, and branching spots. 



The male appendix does not extend be3 7 ond the inner branch, is 

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

 entire. 68 



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



Diagn. Corpus paulo plus quam triplo longius quam latius; cauda truncum 

 longitudine subjrquans. Clypeus areani totam inter palpos mandibularum occupans, 

 in cornu longum productus. Antennulee articulo primo flagelli circiter duplo et 

 dimidio longiore quam articulis 3 ceteris cunctis. Antennae articulo ultimo pedun- 

 culi plus duplo longiore quam articulo penultimo. Epimera ononia angulo posteriore 

 in processum conicum, acutum producto. Segmentum ultimum caudge margine 

 posteriore paulum ultra tertiam partem latitudinis segmenti explente, in medio late 

 ernarginato, angulis in obliquum truncatis, spinis binis (interiore multo longiore 

 quam exteriore), robustis, affixis ornatis. Uropoda caudarn paulum superantia. 

 Long, maris adulti 9 mm. 



E elegantulie sat similis. Corpus minus angustatum quam in mare E. elegantulse; 

 truncus sat multo latior et non brevior quam cauda. 



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

 E. elegantulse. Antennulae paulo crassiores quam in femina E. eleganlulx; pedunculus 

 articulo primo angustiore, ante articulum secundum manifesto prominente, articulo 

 tertio paulo latiore quam longiore; flagellum setis sensilibus sat numerosis, breviori- 

 bus instructum. 



Antennae truncum paulum superantes; flagellum c. 20-24 articulatum; articulis 

 exterioribus ex parte majore longis, seta apicali nulla. 



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

 menta 4 posteriora saltern stria transversa longa instructs. 



Epimera structura in diagnosi commemorata a speciebus omnibus mihi cognitis 

 valde di versa; epimera sexti paris processu conico inter omnes longissimo; epimera 

 septimi paris processu inter omnes brevissimo. 



Pedes parium trium anteriorum fere ut in E. elegantula, setis tamen pluribus 

 instruct!. 



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

 tula; setis tamen pluribus instructi. Pedes septimi paris articulis tertio-sexto in latere 

 inferiore 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 caudte ad basin versus impressione media breviore et pro- 

 funda et utrinque excavatione lateral! profunda et sat magna instructum; impressio 

 media in fundo bicarinata; reliqua in diagnosi commemorata. Uropoda majora, 

 fere ut in mare E. elegantulse formata, margine exteriore rami interioris tamen pau- 

 lum incurvo. 



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



Appendix masculina ramum interiorem minus superans, ad apicem versus valde 

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

 pp. 367-369. 



