330 



Bemorls. — The present new species is very nearly allied to H. 3fiilJni, 

 though easily distinguishable by the rather different form of the frontal part 

 of the cephalon, which gradually tapers to an acute rostrum, and does not 

 form any pronounced tumefication at the place where the eyes are situated. 



(kcHrrence. — I have hitherto only met with this form in a few places 

 off the coast of Norway, thus at Apelvser, Namdal, and in the Trondhjems- 

 fjord. It is a true deep water form, occurring only in greater depths, 

 ranging from 50 to 150 fathoms. 



27. Halimedon megalops, G. 0. Sars. 



(PI. 116, flg. 2). 

 H'llimednn meqalnps, G. O. Sars, Oversigt af Norgee Crustaceer I, p. 96, PI. 4, fig. 9. 



Body comparatively rather stout, and greatly tumefied in its anterior 

 part. Cephalon scarcely exceeding the length of the first '6 segments of meso- 

 • some combined, frontal part horizontally produced and rather broad, being 

 strongly vaulted anteriorly, with only a very short rostral projection jutting 

 out from beneath its end and reaching nearly to the end of the basal joint 

 of the superior antennae, lateral corners of cephalon obtuse at the tip. 

 First pair of coxal plates but little expanded distally ; 4th pair somewhat 

 deeper than the corresponding segment, and having the infero-posteal corners 

 nearly rectangular; 5th pair rather large, though somewhat less deep than the 

 former. Eyes of quite an uniTsual size, rounded in form and placed within 

 the strongly-vaulted anterior part of the front, pigment dark red. Superior 

 antennae in female comparatively short, scarcely exceeding in length the 

 cephalon and the 1st segment of mesosome combined, joints of the peduncle 

 successively diminishing in size, flagelhim a little shorter than the peduncle, 

 and composed of 5 articulations only. Inferior antennae exceeding tlie superior 

 by about Vs of their length, the 2 last joints of the peduncle about of equal 

 length, flagellum nearly as long as the peduncle. Gnathopoda somewhat less 

 feeble than in the 2 preceding species, propodos of both pairs considerably 

 longer than tlie carpus, and somewhat dilated in the middle, palm in the 

 anterior ones about twice as long as the hind margin, in the posterior ones 

 but little longer, carpal expansion of both pairs of exactly the same appear- 

 ance. Pereiopoda comparatively more strongly built than in the 2 preceding 

 species, propodal joints of the 2 anterior pairs narrow linear, and but sparingly 

 setous, dactylus in these pairs, and the 2 succeeding ones, scarcely exceeding 

 in length the propodal joint. Last pair of pereiopoda of moderate lengtli, 

 basal joint very broad, carpal and meral joints about of equal length, propo- 

 dal joint a little longer. Last pair of uropoda with the rami but little longer 



