550 



Boeck is only founded upon adult males of the present species. From 

 A. Wehsteri it may be easily distinguished by its more slender form of body^ 

 the smaller accessory appendage of the superior antennae, and the structure 

 of the gnathopoda in the two sexes. Moreover the superior antennae, as alsc 

 the last pair of pereiopoda, are com]jaratively more elongated, and the colcui 

 of the body rather different. 



Occurrence. — This species is met with much more frequently th.'.u 

 the preceding one, and occurs along the whole south and west coasts o 

 Norway, at least to the Trondhjemsfjord, in depths varying from 10 to 5( 

 fathoms, muddy bottom. 



Distribution. — Bohuslan (Bruzelius), Kattegat (Meinert), the Kat.i 

 Sea (Hansen). 



7. Autonoe megacheir, G. 0. Sars. 



(PI. 195, fig. 2). 

 Autonoe megacheir, G. O. Sars, Crust. & Pycuog. nova Exped. Norv. No. 35. 



Body rather slender, and somewhat resembling in form that o; 

 A. longipes. Cephalon nearly as long as the first 2 segments of mesosomt 

 combined, lateral corners, as usual, obliquely rounded. First pair of coxa 

 plates in female somewhat angular, in male produced anteriorly to a rathe 

 long acuminate projection. Last pair of epimeral plates of raetasome some 

 what more produced at the lateral corners than in the other species, an 

 nearly rectangular. Eyes wanting, being replaced on each side by a smal 

 patch of whitish pigment, without any trace of visual elements. Superio 

 antennae very slender and elongated, nearly attaining the length of the whoh 

 body, 2nd joint of the peduncle, as usual, con.siderably longer and narrowe 

 than the 1st, flagellum nearly twice the length of the peduncle, and compose* 

 of about 20 articulations, accessory appendage longer than the last peduncula 

 joint, and 4-articulate. Inferior antennae scarcely more than half the lengt 

 of the superior, and of the usual structure. Anterior gnathopoda in femal 

 rather strong, with the propodos oblong oval in form, and about the lengtl 

 of the 2 preceding joints combined, dactylus of moderate size, and quit( 

 smooth. Posterior gnathopoda much smaller, and resembling those ir 

 A. longipes. Anterior gnathopoda in male very powerfully developed, basal 

 joint moderately expanded, and having at the infero-posteal corner a dense 

 tuft of comparatively short bristles, the 3 succeeding joints densely setou; 

 only along their lower side, propodos but slightly setous, but rather largf 



