263 

 19. Metopa sinuata, n. sp. 



(PL 92, fig. 2). 

 Syn: Metopa Bruzelii, Hansen (part). 



Body somewhat shorter and stouter than in M. 7>V/cv7/7, though 

 rather compressed. Cephalon considerably exceeding in length the 1st 

 segment of mesosome, lateral corners somewhat more produced than in the 

 said species, and angular at the tip. Coxal plates rather large; 2nd pair 

 obliquely rounded at the tip ; 3rd pair fully twice as deep as the corre- 

 sponding segment, and slightly widening distally; 4th pair considerably 

 broader than they are deep, and of a very characteristic form, the distal 

 edge being not, as usual, evenly curved, but distinctly sinuated in the middle. 

 Last pair of epirneral plates of metasome rather produced at the lateral 

 corners. Eyes somewhat larger than in M. Bruzelii, and irregularly rounded. 

 Antennae comparatively very short and stout, the superior ones not even 

 attaining ^ of the length of the body, 1st joint of the peduncle about the 

 length of the cephalon, and exceeding that of the 2 succeeding joints combined, 

 flagelJum but little longer than the peduncle, and composed of about 12 

 articulations. Inferior antennae about the length of the superior, the 2 

 outer joints of the peduncle rather thick, and about of equal length, flagellum 

 shorter than those joints combined. Anterior gnathopoda comparatively 

 rather strong, and scarcely shorter than the posterior ones, propodos longer 

 than the carpus, slightly dilated in the middle, and armed on the inferior 

 edge with a series of about 5 small denticles in addition to the seise. 

 Posterior gnathopoda comparatively stronger than in M. Bmzelii, though of 

 a somewhat similar structure, propodos in female longer than the 3 preceding 

 joints combined, oblong oval in form, palm rather oblique, and about the 

 length of the hind margin, from which it is defined by a slight angular 

 projection, its edge minutely serrated; propodos in male considerably larger 

 and broader, with the palm less oblique, and the lower corner more projecting. 

 Pereiopoda rather strongly built; last pair with the basal joint broadly oval 

 in form, meral joint considerably produced at the infero-posteal corner, which 

 reaches even a little beyond the carpal joint. Last pair of uropoda with 

 the basal joint not quite so long as the other 2 combined, and armed with 

 2 denticles only. Telson about twice as long as it is broad, with 2 pairs 

 of dorsal denticles, tip obtusely rounded. Colour in the living state of the 

 animal not yet stated. Length of adult female 4 mm. 



Remarks. The present new species is nearly allied to M. Bruzeln, 

 with which form it has indeed been confounded by Dr. Hansen. On a closer 

 examination it is, however, easily distinguishable from that form especially 



