554 



it also oceasionally occurs oS the west coast of Norway, for instance a1 

 Aale8un(l. OlF the south coast and in the Christianiafjord I have, however 

 not yet met with it 



Distribution. — Greenland (Kroyer). Spitsbergen (Goes), Iceland 

 (Torell), Shetland Isles (Norman), Bohuslan (Bruzelius), Kattegat (Meinert). 



Gen. 5. LeptOCheirUS, Zaddach, 1844. 



Syn. : Ptilocheii'us Stimpsou. 



» Protomedeia, Sp- Bate (part). 

 » Boeckia, Malm. 



Body, as a rule, less slender than in the preceding genus, with thi 

 urosome rather strongly built. Anterior pairs of coxal plates comparativeb 

 deep ; 1st pair however, poorly developed, and quite concealed by the greatl;; 

 expanded 2nd pair; 5th pair with the anterior lobe much deeper than th« 

 posterior. Eyes distinct, though small. Antennae of moderate length, th< 

 superior ones the longer, and provided with a well-developed accessor} 

 appendage. Anterior lip subquadrangular in form; posterior lip with thi 

 inner lobes partly fused together, and the outer ones rather broad. Mandible; 

 and maxillae normal. Maxillipeds comparatively large, with the basal am 

 masticatory lobes rather narrow, the latter edged inside and at the tip wltl 

 slender setiform spines, palp slender, with the penultimate joint very mucl 

 elongated. Gnathopoda somewhat unequal in structure ; the anterior ones distinctly 

 subcheliform, and having the ischial joint laminarly expanded; the posterioi 

 ones rather slender, and densely setiferous along their antei'ior edge, carpuj 

 very large, propodos short and conically tapering, without any distinct palm 

 The 2 anterior pairs of pereiopoda with the propodal joint unusually slendei 

 and elongated; the 3 posterior pairs rapidly increasing in length, and having 

 the basal joint large and expanded. The 2 anterior pairs of uropoda verj 

 robust, and armed with strong unguiform spines; last pair comparatively 

 small. Telson likewise rather small, and tubular. 



RemarJcfi. — This genus was established in the year 1844 by Zaddach 

 to include a curious Amphiphod found by him at the coast of Prussia 

 Stimpson's genus Ptilochmrus (1854) is undoubtedly the same, and this is alsc 

 the case with the genus Soech'a of Malm. The generic name proposed bj 

 Zaddach is inconveniently near Lepfochirns, which has been appropriated foi 

 an insect, but it may perhaps be retained. The genus was considered by Boecl; 



