36 



Occurrence. — I have met with this form occasionally in 3 widely remote 

 localities, viz., in Eidsfjord, west of Listerland, at Bekkervig, on the west coast 

 of Norway, and at Apelvser in Namdal. In all 3 places it occurred in rather 

 small numbers together with other Tanaids, in depths ranging from 100 to 150 fathoms. 



Gen. 8. Strongylum, G. 0. Sars. 



Generic Characters. — Body more or less elongated, subcylindric in form, 

 with rather hard integuments. Cephalosome comparatively large, narrowly trun- 

 cated in front. Metasome of quite an unusual size, cylindric, slightly widening 

 behind, and composed of 6 well-defined segments, the last of which is very large, 

 cupuliform. Eyes wanting. Superior antenna? in female rather strong, Particu- 

 late. Mandibles well developed, cutting part strongly incurved, and divided into 

 a few short teeth, molar expansion large, laminar, minutely dentated at the tip. 

 Chelipeds strongly built, with the hand rather large. Pereiopoda comparatively 

 slender and elongated, with the dactylus narrow, setiform. Pleopoda in female 

 wholly absent. Uropoda very small, though distinctly biramous. 



Remarks. — The present genus is prominently distinguished by the 

 peculiar appearance, in the female, of the metasome, which is of quite an unusual 

 size, and has the segments perfectly cylindric, without a trace of epimera. Nor 

 is the slightest rudiment of pleopoda to be detected in the female, whereas in 

 the male they seem to occur in the normal condition. In addition to the type 

 species described below, Messrs. Norman & Stebbing have recorded another sjiecies, 

 S. arctophylax, from the Porcupine Expedition. 



Strongylura eylindrata, G. 0. Sars. 



(PI. XVI, fig. 1). 

 Strongi/lura eylindrata, G. 0. Savs, 1. c. p. 53. 



Specific Characters. — 9- Body rather slender and narrow, about 9 times 

 as long as it is broad, and slightly narrowed in the middle, with the segments 

 marked off by conspicuous constrictions. Cephalosome comparatively large, almost 

 equalling in length the first 3 segments of mesosome combined, oblong oval in 

 form, and slightly narrowed in front. 1st free segment of mesosome much shorter 

 than the others. Metasome occupying rather more than V? of the length of the. 



