be possible that at least this maie belonged to E. sculpticauda, 

 Faxon. In spite of this difficulty I think it justifiable to name the 

 common Atlantic species E. unguiculata,Wi\\. -Suhm. — It may 

 be added that E. unguiculata, Will.-Suhm, E. australis, Dana, 

 and the unnamed Siboga species mentioned below agrée with 

 each other in having the three anterior pairs of thoracic legs slen- 

 der and no small rounded impressions or « cells » on the upper 

 surface of telson, while E. sculpticauda, Faxon, and E. inter- 

 media, H. J. H., — as pointed out in my former paper — have 

 the three pairs of legs named broad or rather broad, and a portion 

 of the dorsal surface of telson adorned with cells or rounded 

 impressions. 



In Eucopia the maie génital apertures are found on small 

 rounded protubérances situated on the postero-interior side of 

 the basai joint of seventh thoracic legs. Adult maies of E. un- 

 guiculata in the Monaco collection measure 26-28™™ in length; 

 they agrée completely with adult females in the shape of the 

 front margin of the carapace, in shape and colour of the eyes, 

 in the slenderness of the three anterior pairs of thoracic legs, 

 etc. The discovery of the real maies of this species leads to a 

 criticism of some statements in the Challenger Report. 

 Sars has described and flgured same parts of a maie which 

 differs considerably from his females in several features. He 

 says (p. 57) that its « eyes are rather larger and thicker, with a 

 darker pigment » ; his fig. i3 on Pl. x represents thèse eyes 

 agreeing with his description, and besides that the front margin 

 of the carapace is considerably more convex than in E. ungui- 

 culata. Furthermore he figures the three anterior pairs of tho- 

 racic legs in this spécimen (figs. 14 and 16 on Pl. x) as shorter 

 and much thicker than in a female (Pl. x, fig. 2); in the text 

 (p. 59) he mentions second and third pairs of legs as « much 

 more powerful than in the female, the propodus being exceed- 

 ingly dilated.... » He is of the opinion that the features pointed 

 out are only sexual différences between maie and female of 

 E. australis, but his figures and utterances referred to prove 

 beyond question, that his maie belongs to E. sculpticauda, 

 Faxon, or E. inter média, H. J. H., and he has certain ly over- 

 looked that its telson shows interesting peculiarities. Sars gives 



(42) 



