256 



last joints of the peduncle nearly equal-sized, flagellum longer than those 

 joints combined. Anterior gnathopoda with the meral joint but little produced 

 at the end inferiorly, propodos about the length of the carpus, but somewhat 

 narrower, inferior edge with a single denticle about in the middle. Posterior 

 gnathopoda rather powerful, meral joint without any trace of an ascending 

 lamella inside, propodos very large, nearly as long as the basal joint, and 

 oblong quadrangular in form, gradually widening, somewhat distally, palm 

 nearly transverse, and much shorter than the hind margin, from which it is 

 defined by a strong acute projection, its edge somewhat arcuate, and regularly 

 serrated. Pereiopoda somewhat less robust than in M. lorecdis; last pair 

 with the basal joint oblong oval in form, meral joint produced nearly to 

 the end of the carpal one. Last pair of uropoda with the basal joint very 

 short, not exceeding the length of the succeeding one, and only armed with 

 a single small denticle at the end. Telson quite unarmed, and rather 

 elongated, more than twice as long as it is broad, tip obtusely rounded. 

 Body whitish pellucid, banded with narrow stripes of a beautiful crimson 

 colour, the bands extending obliquely down the coxal plates in a somewhat 

 wavy manner; ova in the marsupial pouch bluish. Length of adult female 4 mm. 



Remarks. - The present species shows some points of resemblance 

 both to M. Alcleri and M. boreal is, though being easily distinguishable from 

 either of them, not only by the beautiful colouring of the body, but also by 

 the rather characteristic structure of the posterior gnathopoda. 



Occurrence. I first detected this form at Christiansund, west coast 

 of Norway, where 2 specimens were collected from a depth of about 30 

 fathoms. 'A third specimen I procured at Vadso, Finmark. 



Distribution. The Dutch coast (Hoek); Kattegat (Meinert). 



14. Metopa pusilla, n. sp. 



(PI. 90, fig. 1.) 



Body rather short and compressed, with the metasome (in female) 

 poorly developed. Cephalon about twice the length of the 1st segment of 

 mesosome, lateral corners sharply angular at the tip. Coxal plates very 

 large; 2nd pair obliquely curved in front; 3rd pair more than twice as deep 

 as the corresponding segment, and scarcely expanded distally; 4th pair some- 

 what larger than the 2 proceeding pairs combined, and nearly as deep as 

 they are broad, distal edge strongly curved in the middle. Last pair of 

 epimeral plates of metasome not very much produced, though terminating 



