639 



allied to D. porrcda, and in the female sex, is not easy to distinguish. The 

 male, however, is at once recognizable by the peculiar development of the 

 anterior pair of coxal plates: the posterior gnathopoda are also rather 

 unlike in shape. 



Occurrence. — I have met with this form rather abundantly off the 

 Finmark coast, especially at Vadso, in depths ranging from 20 to 50 fathoms. 

 It also occurs along the west coast of Norway and in the Trondhjemsfjord. 



Distrihiition. — Skagerak (Metzger), Kattegat (Meinert). — 



7. Dulichia curticauda, Boeck. 



(PI. 230, fig. 2). 



Dulichia curticauda, Boeck, Crust, amph. bor. & arctica, p. 184 Q. 



Syn.: Dulichia tuberculata, Boeck (J. 

 » — septentrionalis, G. O. Sars. 



Body of an appearance similar to that in the 2 preceding species, 

 though perhaps somewhat less slender. Cephalon about the length of the 

 first 2 segments of mesosome combined, and somewhat prodiiced in front. 

 First pair of coxal plates not produced in the male; 2nd pair but little larger 

 in the latter than in female. Eyes large, rounded, with dark red pigment. 

 Antennae very slender, with only scattered fascicles of delicate bristles, the 

 superior ones much longer than the inferior, and nearly equalling in length 

 the whole body, flagellum longer than the last peduncular joint, accessory 

 appendage 3-articulate, with the middle articulation much the longest. An- 

 terior gnathopoda nearly as in the 2 preceding species. Posterior gnatho- 

 poda in female having the carpus expanded in the middle, propodos about 

 same length and oblong oval in form; those in male rather stout, basal joint 

 somewhat expanded at the end, propodos very large, oval quadrangular in 

 form, being produced below, near the base, to a narrow spiniform, slightly 

 defiexed process, palm forming in front another acute projection pointing 

 anteriorlj-, dactylus of moderate .size, and, as in the 2 preceding species, 

 provided at the base inside with a tuberculiform prominence. Anterior pairs 

 of pereiopoda with the basal joint but very slightly expanded; the 3 pos- 

 terior pairs considerably more elongated than in the 2 preceding species. 

 First pair of uropoda with the basal part armed outside with about 8 spines; 

 2nd pair having the basal part unusually short, scarcely half as long as 

 that of the 1st pair. Body whitish, more or less variegated with a reddish 

 brown pigment. Length of adult male 5 mm. 



