379 



may be regarded as the type of the present genns, seems to be very nearly 

 related to the New Zealand form described liy Thomson as Panoplfsa spinosa. 

 From tlie following Norwegian species it is easily distinguishable by its 

 much larger size, and especially by the rather iliiferent form of the last pair 

 of epimeral plates of metasome. 



Occurrence. — Along the whole south and west coasts of Norway, this 

 form is very commonly foiind, in moderate depths, ranging from to ?>0 

 fatlioms, especially on a bottom consisting of coarse sand and covered with 

 stones overgrown with algae. It extends northwards to the Lofoten Isles, 

 and I have also met with it in a single locality off the Finmark coast, viz.. 

 at Hammei'fest. 



Distribution. — British Isles (Sp. Bate), Bohiislan (Bruzelius), Katte- 

 gat (Meinert), coast of France (Chevreux). 



4. Iphimedia minuta, G. 0. Sars. 



(PI. 133, fig. 1). 



Iphimedia minutn, G. O. Sars, Ovevsigt af Norges Criistaceer, I, p. 100, PI. 5, lig. 2. 



Syn.; Iphimedia eblaiiEe var., Steljbing. 



In its external appearance very like I. ohesa, but of much smaller 

 size, and having the dorsal lobes comparatively larger than in that species. 

 Rostrum strongly curved, and scarcely reaching beyond the basal joint of the 

 supei'ior antennae. Coxal plates about as in /. obesa, though the 4th pair 

 appear somewhat narrower. Last pair of epimeral plates of metasome divided 

 at the lateral corners into 2 somewhat recurved projections, slightly serrated 

 on the edges, and separated by a narrow sinus, the upper projection conside- 

 rably larger than tlie lower. Eyes large, reniform, pigment dark red. 

 Supei'ior antennae with the dentiform projection of the basal joint somewhat 

 smaller than in /. obesa and less acute, flagellum scarcely more than twice the 

 length of the peduncle, and composed of a smaller number of articulations. 

 Mandibles having the cutting part comparatively more prolonged than in that 

 species, and the secondary lamella considerably narrower, palp less robust. 

 First pair of maxillae with the palp very small, not even reaching to the end 

 of the masticatory lobe. Maxillipeds with the 1st joint of the palp not nearly 

 as long as the other 2 combined. Anterior gnathopoda having the propo- 

 dos scarcely longer than the carpus, chela very minute, with the dactylus 

 simple, not dentated. Posterior gnathopoda comparatively more strongly 

 built than in /. obesa, propodos somewhat dilated in its distal part, and setous 

 only along the outer half of the lower edge. Last pair of pereiopoda with 



