298 



larly alternating with each other, and thus exhibiting a peculiar tessellated 

 appearance. Length of adult female 8 mm. 



Erniarls. — This form was at first described by Mr. Schneider under 

 the name of 3/. twrvegicus, Boeck. Subsequently, recognizing its distinctness 

 from that species, he proposed for it the name of trsseMatus owing to the 

 peculiar colouring of the body, I have myself formerly confounded it with 

 M. carinatH^i Sp. Bate, to which it bears some resemblance as regards the 

 outward appearance. From both these species it may, however, on closer exami-. 

 nation, be distinguished by several well-marked characteristics, the form of 

 the cephalon being the most conspicuous one. 



Occurrence. — Off the whole coast of Finmark this species is rather com- 

 monly met with in moderate depths ranging from 20 to 50 fathoms. It extends 

 southwards along the Nordland coa.st to Kvalo. Off the west and south coasts 

 of Norway, I have, on the other hand, never met with this species, and it 

 thus would seem to be an exclusively northern form. Out of Norway it has 

 not yet been recorded. 



7. Monoculodes borealis, Boeck. 



(PI. too, fig, 2). 



Mofwailndes borealis, Boeck, Crust, amph. bor. & arrt. p. S8. 



Syn : (Ediceros affinis, Gol'S (part). 



Body somewhat slender, and not very tumid in its anterior part, meta- 

 some scarcely carinated dorsally. Cephalon exceeding in length the 3 anterior 

 segments of mesosome combined, frontal part rather produced, rostrum abruptly 

 deflexed, thus giving the upper contour of cephalon in front a geniculated 

 appearance, its tip sharply pointed and reaching about to the end of the basal 

 joint of the superior antennse, lateral corners of cephalon rectangular. First 

 pair of coxal plates considerably expanded di.stall3^ 3rd pair somewhat obliquely 

 truncated at the tip; 4th pair a little deeper than the corresponding segment, 

 distal edge strongly curved in tlie middle, infero-posteal corners but slightly 

 produced. Eyes not very large, rounded, placed just within the geniculated 

 part of the front, pigment dark red. Superior antennae in female about the 

 lengtli of the cephalon and the 3 anterior segments of mesosome combined, 

 and but slightly reaching beyond the peduncle of the inferior ones, 1st 

 joint of the peduncle a little longer than the 2nd, flagellum much shorter 

 than the peduncle, and composed of 8 articulations only. Inferior 

 antennae with the last joint of the peduncle shorter tlian the penultimate 

 one, tiagellum (in female) about the length of those joints combined. Anterior 



