469 



instricted, with the infero-posteal corner scarcely at all produced. Branchial 

 lamellae simple. Last pair of uropoda extending considerably beyond the 

 others, rami very elongated, knife-shaped, and densely edged with spines. 

 Telson scarcely longer than it is broad at the base, cleft very narrow and 

 extending nearly to the base, terminal lobes transversely truncated at the 

 tip, and, as usual, each armed with a small apical spinule. Colour in the 

 living state of the animal not yet stated. Length of adult female 

 reaching 23 ram. 



BemnrJiS. — This form was first described by Goes as ParampJiithoi; 

 Smifti\ and was subsequently referred by Boeck to the genus Atylm of Leach. It 

 is, however, evidently congeneric with the 3 above-described species, and in 

 its general appearance even considerably resembles P. vedloniensis, from which 

 it yet distinguishes itself pretty well, not only by its very large size, but 

 also by several well-marked structural details, for instance the much greater 

 projection of the rostrum, the small eyes, and the structure of the legs and 

 the last pair of uropoda. 



Occurrence. — I have not myself met with this form off the coast of 

 Norway, but it is stated by Boeck to occur off the coast of Finmark, and 

 there is indeed in our Museum collection a single somewhat imperfect specimen 

 collected by the late Prof. Esmark at Kjeldsnses, Sydvaranger. The figures 

 here given are fi'om arctic specimens collected during the Norwegian North 

 Atlantic Expedition. 



Distribnfion. — Arctic Ocean: Greenland (Torell), Spitsbergen (Goe.s), 

 the Barents Sea (Hoek), the Kara Sea (Hansen), the Siberian Polar Sea 

 (Stuxberg). 



5. Paratylus nordlandicus (Boeck). 



(PI. 165, flg. 2). 

 Atyhis nordlandicus, Boeck, Crust, amph. bor. & arct. p. 113. 



Body, as usual, much compressed, and very conspicuously carinated 

 dorsally, the carina being elevated in the 2 posterior segments of mesosome 

 and those of metasome to compressed projections increasing in size posteriorly. 

 First segment of urosome having, like the other species, 2 successive dorsal 

 projections, the anterior of which is very small. Cephalon produced in front 

 to a rather large, nearly horizontally projecting rostrum, reaching beyond the 

 middle of the basal joint of the superior antennae, anterior edges of cephalon 

 nearly as in P. vedloniensis, exhibiting above a short acute lappet and loelow 

 a broadly rounded lobe. Anterior pairs of coxal plates rather deep, the first 



