170 



inferior ones, iiagellum not twice as long* as the peduncle, and composed of 

 about 10 articulations ; those in male somewhat more elongated, though scar- 

 cely reaching beyond the peduncle of the inferior ones. The latter in female 

 hardly more than half the length of the body, penultimate joint of the 

 peduncle much longer than the last one. Anterior gnathopoda not very strong, 

 propodos oblong oval, and but slightly dilated near the base ; that of the 

 posterior ones about half the length of the carpus, and less narrow than in 

 the preceding species. Anterior pairs of pereiopoda witli the meral joint 

 rather broad, and forming at the end anteriorly a rounded projecting lobe 

 more distinct on the 1st pair, dactylus very slender, and considerably exceeding 

 in length the 2 preceding joints combined. Last pair of pereiopoda rather 

 robust, basal joint shorter than the remaining part of the leg, and having the 

 posterior expansion nearly transversely truncated at the tip, outer joints 

 unusually broad, meral one forming posteriorly a deflexed lobe fringed with 

 numerous ciliated setae, carpal joint triangular, angularly produced anteriorly, 

 propodal joint very large, fully as long as the 3 preceding joints combined, 

 and oblong oval in form, dactylus half its length, and narrowly lanceolate. 

 Last pair of uropoda with both rami rather broad, foliaceous, and fringed on 

 their opposite edges with ciliated setse. Telson rather large, about twice as 

 long as it is broad, slightly constricted near the base, the outer part triangularly 

 tapering, and having on each side a row of small bristles somewhat within 

 the edge dorsally. Body whitish, pellucid, mottled with scattered stellate pig- 

 mentary spots of a dark brownish colour, cephalon and the anterior pairs of 

 legs partly speckled with light-yellow. Length of adult female 12mm, of 

 male about the same. 



Remarks. This is an easily recognizable species, chiefly characterised 

 by the peculiar form of the cephalon, the deeply Insinuated last pair of epi- 

 meral plates of metasome, and by the structure of the last pair of pereiopoda. 

 Also the coloration of the body is rather characteristic. The Araneops Irrri- 

 cornis Costa, of which I have collected a few specimens in the gulf of Naples, 

 is unquestionably this species, and not, as believed by Boeck, A. macrocephala. 

 Likewise, there cannot be any doubt that the Am-pcl'tKca (Tetromatus) Iwlliava 

 of Sp. Bate is the same species. 



Occurrence. - - Off the south and west coast of Norway this species is 

 by no means rare, occurring, as a rule, on sandy bottom, in depths varying 

 from 20 to 60 fathoms. It extends northwards to Groto and Slaatholmen 

 (Lofoten Isles), where it was collected by Dr. Danielssen. 



Distribution. - British Isles (Sp. Bate), coast of France (Chevreux), 

 Mediterranean (Costa), Kattegat (Meinert), Bohuslan (Bruzelius). 



