421 



elongated, exceeding half the length of the body, 1st joint of the peduncle 

 about the length of the 2nd, but much thicker, and having at the end several 

 small dentiform projections; 2nd joint as usual produced at the tip to 2 lappets 

 encompassing the base of the last joint, the inner of these lappets being divided 

 into 5 denticles, flagellum nearly twice the length of the peduncle, and composed 

 of numerous articulations bearing distinct calceolae, accessory appendage very 

 narrow, and about as long as the last peduncular joint. Inferior antennae 

 considerably shorter than the superior, last joint of the peduncle longer than 

 the penultimate one, flagellum about the length of those joints combined, and, 

 like the latter, edged with distinct calceolse. (inathopoda moderately strong, 

 carpal process not very large, propodos subquadrangular in shape, but little 

 broader than it is long, palm slightly arcuate, dactylns slender, and curved 

 at tiie tip. Pereiopoda very slender and elongated, m.eral joint of the 2 

 anterior pairs about the length of the propodal one, basal joint of the 3 

 posterior pairs oblong oval, tapering distally, and having the posterior edge 

 strongly serrated. Last pair of uropoda with the rami subequal in size and 

 narrowly lanceolate. Telson comparatively smaller than in the other species, 

 and gradually tapering distally, cleft occupying about Vs of the length of 

 the telson, terminal lobes acuminate and scarcely diverging. Body light straw- 

 ruloured, and everywhere mottled with small brick-red pigmentary specks; 

 ova in the marsupial pouch dark bluish green. Length of adult female 

 reaching 13 mm. 



BemarJcs. — The present species was first announced by Boeck in the 

 year 1860, at the meeting of the Scandinavian naturalists in Christiania, and 

 was, somewhat later, described by Sp. Bate as E. helvetice, from an imperfect 

 specimen. According to Boeck the E. hidens of Heller is also identical with 

 the present species. It is easily distinguishable from the other species bj^ 

 the presence of only 2 dorsal projections, and by its beautiful pigmentarj' 

 ornament. From E. propinqvus, to which species it bears a rather strong 

 resemblance, both in size and general appearance, it may, on a closer 

 examination, be readily distinguished by the much greater length of the 

 superior antennee and of the meral joint of the 2 anterior pairs of pereiopoda, 

 as also by the comparatively smaller and less deeply cleft telson. The form 

 recorded by the Rev. Mr. Stebbing, under this name, from the Challenger 

 Expedition, is scarcely identical with Boeck's species. 



Occurrence. — The present species is not rarely found along the 

 wliole south and west coasts of Norway, in depths ranging from 30 to 100 

 fathoms. It also occurs in the Trondhjemsfjord, and extends, according to 

 Boeck, even as far north as the Lofoten Isles. 



5i — Crustacea. 



