336 



uropoda ratlier slender and elongated, thongli scarcely projecting beyond the 2 

 other pairs, rami shorter than the basal part, the inner one armed witli a 

 dense row of small spinules inside. Telson small, rounded quadrangular in 

 form, about as broad as it is long, tip slightly insinuated. Colour pale yel- 

 lowish, with indistinct whitish bands across the segments of mesosome. Length 

 of adult female scarcely exceeding 5 mm. 



Remarks. — Though, as regards the general appearance, very like the 

 preceding species, this form is, on a closer examination, easily distinguish- 

 able by several well-marked characteristics. Thus the structure of the 

 posterior gnathopoda is rather peculiar, from the extremely slender form of 

 the propodos, and for this cause, indeed, the specific name of longimanns would 

 have been much more properly applied to this species than to the preceding 

 one. Moreover, the 2 posterior pairs of pereiopoda are much more elongated 

 than in that species, the last pair especially being highly remarkable for 

 their excessive length ; but as these legs are very brittle, it is rather 

 unusual to get a specimen with them uninjured. 



Occurrence. — This form would seem to be much less common than B. 

 lonfjimanus. I have collected it in a few places off the west coast of Norway 

 in company with the former, and have recently also found it in the Trond- 

 hjemsfjord. Boeck records it moreover from the Christianiafjord. As is the 

 case with B. longimanus, it is a true deep-water form, only occurring in 

 greater depths, ranging from 50 to 300 fathoms. Out of Norway it has not 

 yet been recorded. 



31. Bathymedon obtusifrons (Hansen). 



(PI. 118, fig. 2). 

 Htdimedon obtusifrons, Hansen, Malaco.straoa Groeiilaiidia>, p. IIG, PI. V, fig. 1. 

 Syn. : Ilalimcdon Sangsurci, .Sclineider (not Boeck). 



Body much more strongly built than in the 2 preceding species, and 

 rather tumid in its anterior part. Cephalon scarcely exceeding in length the 

 first 2 segments of mesosome combined, rostral projection very short and 

 blunted at the tip, lateral lobes rather deep and obtusely rounded. First 

 pair of coxal plates but very little expanded distallj^ and scarcely broader 

 tlian the succeeding pair; 4th pair about as deep as the corresponding seg- 

 ment, and having the infero-posteal corners somewhat produced, though obtuse 

 at the tip. Eyes quite visible in the living animal, though without any 

 distinct visual elements, consisting merelj^ of a rounded, light red pigmentary 

 mass placed dorsally somewhat behind the rostral projection. Antennae com- 

 paratively short and stent, with fascicles of diverging bristles at the end of 



