255 



2 very minute denticles. Telson oblong oval in form, about twice as long 

 as it is broad, and quite unarmed, tip obtusely rounded. Colour in the 

 living state of the animal, not yet stated. Length of adult female 5 mm. 



Remarks. - - As before stated, I had previously fallen into a grave 

 error in confounding this form with that described above as M. JBoeckii. It 

 is indeed on a closer inspection easily distinguishable from that species, not 

 only by its comparatively much stouter body, but also by the far less 

 slender antennae and pereiopoda, and finally by the unarmed telson. In these 

 points it bears a much closer resemblance to M. Alderi, from which it how- 

 ever may at once be distinguished by the comparatively short and equal-sized 

 antennse, and by the somewhat deviating structure of the posterior gnathopoda. 

 The form recorded under this name, but with some doubt, from Greenland by 

 Dr. Hansen, is most probably the present species, at least to judge from the 

 figure of one of the posterior gnathopoda given. 



Occurrence. - For the cause mentioned above, I am at present unable 

 to indicate with certainty the localities, where this species occurred, but 

 believe them to have belonged either to the west coast of Norway or to 

 the coast of Pinmark, most probably to both of them. 



Distribution. - Greenland (Hansen). - 



13. Metopa rubrovittata, G. 0. Sars. 



(PL 89, fig. 2). 

 Metopa rubrovittata, G. 0. Sars, Overs. Norges Crust. I, p. 90, PI. 4, fig. 2, 2 a. 



Body rather stout and compact. Cephalon about twice as long as the 

 1st segment of mesosome, lateral corners distinctly angular at the tip. 

 Coxal plates very large and deep ; 2nd pair obliquely truncated at the end ; 

 3rd pair considerably more than twice as deep as the corresponding segment, 

 and scarcely expanded distally; 4th pair very largely developed, nearly 

 twice as large as the 2 preceding pairs combined, and subelliptical in form, 

 the breadth being considerably greater than the depth, distal edge less 

 oblique, and evenly curved throughout. Last pair of epimeral plates of 

 metasome considerably produced at the lateral corners, though the tip is 

 obtusely pointed. Eyes comparatively small, rounded, pigment dark red. 

 Antennse not very elongated, the superior ones scarcely exceeding in length 

 the third part of the body, 1st joint of the peduncle fully as long as the 

 cephalon, and somewhat exceeding the length of the other 2 combined, 

 flagellum scarcely half as long again as the peduncle, and composed of about 

 10 articulations. Inferior antennae a little shorter than the superior, the 2 



