93 



longer than the preceding part of the body, and almost quadrate in form, with 

 the anterior and posterior corners laminarly expanded, and connected by a lateral. 

 creimlated crest; dorsal face armed in the middle with 2 very strong juxtaposed 

 spines, slightly curved in front, and having behind them scattered tubercles, hind 

 edge raised, and armed with 3 strong tubercles. The 3 posterior segments of 

 mesosome carinated dorsally, and having laterally scattered tubercles. Metasome 

 with the proximal segment distinctly carinated dorsally and constricted in the 

 middle; terminal segment only carinated in its anterior part, and tapering to an 

 acute point. Eyes rather large and convex, rounded. Superior antennse with the 

 nagellum longer than the 2 preceding joints combined, and carrying, in female 2, 

 in male 3 apical olfactory filaments. Inferior antennse scarcely more than half as 

 long as the body, Hagellum very small, with a discontinuous row of denticles in- 

 side, 1st joint scarcely as long as the other 2 combined, terminal spine nearly 

 as long as the last joint. Colour greyish brown, with more or less distinct, darker 

 brown pigmentary ramifications. Length of adult female 6 mm., of male scarcely 

 more than half that size. 



Remarks. This is as yet the only known species of the genus, and may 

 be easily recognized, at least in the female sex, by the large size and peculiar 

 shape of the middle segment of the mesosome. 



Occurrence. I have met with this form not infrequently in several places, 

 both on the south and west coasts of Norway, in depths ranging froir 20 to 30 

 fathoms, on a muddy bottom covered with decaying alg3. 



Distribution. British Isles (Robertson), Mediterranean at Messina and 

 Spezia (the present author). Skagerak and Kattegat (Meinert). 



