251 



other 2 combined, and armed with 5 extremely small denticles. Telson 

 rather large, oblong oval in form, not quite twice as long as it is broad, and 

 without any trace of dorsal denticles, outer part evenly rounded off at the 

 tip. Body whitish, pellucid, with a few scattered reddish patches, sometimes 

 arranged as obliquely transverse bands. Length of adult female 7 mm, of 

 male about the same. 



Bemarks. The present species, first described by Sp. Bate, is 



regarded by Boeck as the type of the present genus. It may be distinguished 

 from most of the other known species by the strong development of the 

 inferior antennae, and by the structure of the posterior gnathopoda in the 

 2 sexes. The Lcucoflwe iiorrnjica of Lilljeborg seems to be founded upon 

 the adult male of this species, at least to judge from the figure given by 

 Sp. Bate of one of the posterior gnathopoda of this form. Also the figure 

 given in Boeck's work of the same legs, and referred to Metopa clypeata var., 

 is undoubtedly drawn from a male specimen of the present species. 



Occurrence. Off the south and west coasts of Norway this species 

 is found not infrequently in moderate depths, from 20 to 60 fathoms. It 

 extends northwards at least to Tromso, where it has been collected by 

 Mr. Schneider. 



Dixtrilution. - - British Isles (Sp. Bate), Kattegat (Meinert), Spitsbergen 

 (Goes), the Murman coast (.Tarzynsky), Iceland (Norw. North Atl. Exp.). 



10. Metopa spectabilis, (T. O. Sars. 



(PI. 87). 

 Metopa spectabilis, G. O. Sars, Crust. & Pygnog. nova etc. No. 28. " 



Very like the preceding species, but more than twice as large and 

 comparatively more slender of form. Cephalon with the lateral lobes 

 somewhat narrower, and obtusely rounded at the tip. Coxal plates nearly 

 as in M. Ald< i'i. Last pair of epimeral plates of metasome likewise very 

 similar in form, though the lateral corners appear somewhat more sharpened 

 and the posterior edge slightly flexuous. Eyes comparatively much smaller 

 than in M. Alder i, and of rounded form, pigment dark red. Antennae very 

 unequal, the superior ones being in both sexes much shorter than the 

 peduncle of the inferior, their 1st joint rather elongated, considerably 

 longer than the cephalon, and equalling in length the 2 succeeding ones 

 combined, flagellum but little longer than the peduncle. Inferior antennae 

 very strong, especially in the male, nearly pediform, the 2 outer joints of 

 the peduncle much elongated and highly chitinized, flagellum very small, 



