67 



pair deeper than they are broad and forming at the infero-posterior corner 

 a projecting triangular lobe. Last pair of epimeral plates of metasome with 

 the infero-lateral corners a little produced, posterior edge smooth. First 

 segment of urosome having a slight transversal depression at the base; Kves 

 oval, somewhat narrowed above, pigment light red. Superior antenna* witli 

 the 1st joint of the peduncle rather large, flagellum scarcely longer than the 

 peduncle, 10-articulate, with the 1st joint about as long as the :> succeeding 

 ones combined; accessory appendage scarcely half the length of the tlagcllmn. 

 4 5-articulate. Inferior antennae in female only little longer than the superior, 

 flagellum 10 12-articulate. Epistome slightly projecting in front of the 

 anterior lip and evenly rounded. Anterior gnathopoda comparatively slender, 

 propodos about as long as the carpus and very slightly tapering to tin- 

 somewhat obliquely truncated tip. Pereiopoda unusually short, with the dactvlus 

 very minute; basal joint of the 3 posterior pairs very large, longer than the 

 remainder part of the leg. Last pair of uropoda with the inner ramus fully 

 as long as the basal joint of the outer, the latter provided (in female) with 

 a single seta on the inner edge. Telson nearly twice as long as broad, cleft 

 beyond the middle, lateral lobes slightly diverging at the tip. Body pale 

 yellowish red, or flesh-coloured, each segment having at the infero-lateral 

 corners a small orange-coloured speck. Length of adult female scarcely 

 exceeding 6 mm. 



Remark*. The present species was first described by Kroyer as 

 an Anonyx and subsequently referred by Boeck to his genus Orchomene. It 

 may be regarded as the type of the genus. 



Occurrence. - The species would seem to occur along the whole coast 

 of Norway, but is especially very frequent in the Arctic region, off the coast 

 of Nordland and Finmark, in moderate depths, from 20 to :~>() fathoms. 



Distribution. Arctic Ocean: Greenland, Spitsbergen, the Miinnaii 

 Coast, the Siberian Polar Sea (Stuxberg); ? British Isles (Sp. Bate); ? Ad- 

 riatic (Heller). 



24. Orchomenella pingvis, (Boeck). 



(PI. 24, fig. 2). 

 Orchomene pingvis, Boeck, Crust, amphip, bor. &, arctica, p. 30. 



Very like the preceding species in its general habitus, though perhaps 

 somewhat thicker in proportion to its height, Lateral corners of eephalon 

 narrowly rounded at the tip. Coxal plates not fully ;is deep as in 0. im'imfti. 

 1st pair distinctly expanded below, 5th pair exhibiting a similar projecting 

 lobe at the infero-posterior corners as in that species. Last pair of epimeral 

 plates of metasome rounded at the infero-lateral corners, posterior edge 



