640 



Remarks. - This form has been described by Boeck under 2 different 

 names, viz., D. tuberculata and D. cnrticauda, the former being the male, the 

 latter the female of one and the same species. The form described by 

 me from the Norwegian North Atlantic Expedition as D. septentrionalis, 

 I now regard as identical with Boeck's species. It is somewhat intermediate 

 in character between D. porrecta and D. falcata, though being somewhat more 

 closely related to the latter species, from which it may be distinguished by 

 its much smaller size and the somewhat different structure of the posterior 

 gnathopoda. Moreover the basal part of the 2nd pair of uropoda is unusually 

 short, and this feature may have given rise to the name curticauda proposed 

 by Boeck for the female. 



Occurrence. - The species would seem to occur along the whole Nor- 

 wegian coast, from the Christianiafjord to Vads0, in moderate depths, together 

 with the other species. 



Distribution. Spitsbergen (Norw. North Atl. Exped.). 



8. Dulichia falcata, (Sp. Bate). 



(PI. 231, fig. 1). 

 Dyopedos falcatus, Sp. Bate, Ann. Nat. Hist. 2 ser. Vol. XIX, p. 151. 



Body rather slender and elongated, especially in the male, and quite 

 smooth. Cephalon about the length of the first 2 segments of mesosome 

 combined, and somewhat produced in front. First pair of coxal plates very 

 small and of same appearance in the two sexes; 2nd pair a little larger in 

 male than in female, and slightly bilobed. Eyes very large, rounded, with 

 dark red pigment. Superior antennae exceedingly elongated and slender, 

 being considerably longer than the whole body, flagellum about the length 

 of the last peduncular joint, accessory appendage extremely minute, though 

 distinctly 3-articulate. Inferior antennae much shorter than the superior. 

 Anterior gnathopoda nearly as in the preceding species. Posterior gnathopoda 

 in female with the carpus of moderate size and somewhat expanded in the 

 middle, propodos slightly exceeding the carpus in length, and oblong oval in 

 form; posterior gnathopoda in male very powerfully developed, basal joint form- 

 ing at the end anteriorly a rounded expansion, propodos exceedingly large, oval 

 quadrangular in form, and densely setiferous below, palm produced in front to 

 an anteriorly-pointing acute projection, and defined posteriorly by a somewhat 

 lamellar Und peculiarly contorted, thumb-like process, dactylus rather large 

 and densely etous. with a small tuberculiform prominence inside at the base. 



