24 



5. Hemilamprops uniplieata, G. 0. Sars. 

 (Pi. xvi, xvn.) 



Lamprops uniplicata, G. O. Sars, Unders0gelser over Hardangerfjordens Fauna I, Chr. Vid. Selsk. 



Forh. 1871, p. 27. 



Specific Characters. Body in both sexes exceedingly slender and elongated, 

 with the anterior division somewhat vaulted dorsally and rather sharply marked 

 off from the posterior, though its last segment is not much broader than the 1st 

 caudal one. Tail considerably exceeding the anterior division in length and 

 gradually attenuated distally. Carapace about the length of the exposed part of 

 the trunk, and exhibitiner on each side, somewhat in front of the middle, a single 

 very conspicuous, obliquely curved fold or carina, upper margin straight, lower 

 evenly arcuate, anterior extremity, viewed laterally, conically tapered, viewed 

 dorsally, bluntly rounded; pseudorostral projection somewhat produced, though 

 rather short; frontal lobe slightly keeled dorsally. Eye very small, though 

 distinct, with red pigment. Inferior antennae of male not attaining the length 

 of the body. 1st pair of legs slender and elongated, almost equalling in 

 length the anterior division of the body, last joint very narrow and fully as 

 long as the penultimate one; 2nd pair with the antepenultimate joint longer 

 than the last 2 combined, and coarsely spinous inside; 3rd pair in male 

 with the outer 2 joints peculiarly transformed. Uropoda very slender, exceeding 

 in length the last 2 caudal segments combined, inner ramus much longer than 

 the outer, and armed inside- with numerous short spinules, outside with about 

 16 seta?. Telson about the length of the basal part of the uropoda, narrow 

 linguiform in shape, and armed with from 12 to 16 marginal spines, 3 of which 

 issue from the rounded tip and are somewhat longer than the others. Colour 

 bright orange. Length of female 7 mm., of male about the same. 



Remarks. The present species is easily distinguishable from the 2 pre- 

 ceding ones by the form and sculpture of the carapace, as also by the structure 

 of the terminal caudal appendages. The colour also is rather characteristic. 



Occurrence. I first detected this species at Mosterhavn in the outer part 

 of the Hardanger Fjord, and have subsequently also met with it in 3 other lo- 

 calities of the west coast, viz., at Aalesund and Christiansund, in the Trondhjem 

 Fjord, and finally off the Lofoten. Islands. It is a true deep-water form, only 

 occurring in depths of from 60 to 150 fathoms, sandy bottom. 



Distribution. Stat. 31 & 124 of the Norwegian North Atlantic Expedition, 

 both belonging to the cold area, outside the Norwegian coast. 



