123 



1. Pontoporeia femorata, Kroyer. 



(in. 41, fig. 1). 



Pontoporeia femorata, Kroyer^ Nat. Tidsskr. 1 R. Bd 4, p. 153. 

 Syn: Pontoporeia furcigera, Bruzelius. 



Body glabrous, moderately compressed, with the back broadly rounded. 

 Cephalon about as long as the 2 first segments of mesosome combined, lateral 

 corners rather jjroduced, and angular at the tip. The 3 anterior pairs of coxal 

 plates each with a small dentiform projection at the infero-posteal corner; 

 1st pair very much expanded di-stally ; 5th pair rather large, with the anterior 

 lobe almost as deep as the ^n'eceding pair. Last pair of epiraeral plates of 

 metasonie narrowly roiinded at the lateral corners. First segment of urosome 

 provided dorsally with a peculiar upturned, bifurcated process. Eyes reni- 

 form, pigment bright red. Superior antennse with the 1st joint of the peduncle 

 rather large, longer than the other 2 combined, flagellum considerably shorter 

 than the peduncle, and composed of 9 articulations ; accessory appendage very 

 small, biarticulate. Inferior antennae with the 2 outer joints of the peduncle 

 nearly equal in length, flagellum about the length of these 2 joints combined, 

 and c(jmposed of 12 articulations. Anterior gnathopoda having the outer 

 joints much expanded, carpus very broad, forming inferiorly a rounded setous 

 lol)e, pro])odos oblicjuely oval, with the inferior edge considerably bulging out 

 in its posterior part, dactylus very slender and ciu'ved. Posterior gnathojioda 

 with the propodos somewhat shorter than the carpus. Last pair of pereiopoda 

 with the liasal joint very large, mncli longer than the remaining part of the leg, 

 and densel}' setous at the posterior edge. Last pair of uropoda having the outer 

 ramus considerably larger than the inner, and densely spinous on the (niter 

 edge. Telson triangular oval, somewhat more long than broad, cleft extending 

 beyond the middle, terminal lolies narrowly rounded, each with 3 small apical 

 bristles. Colour uniformly pale 3'ellowish. Length uf adult female 14 mm. 



Eemarks. — That this is the Kroyerian species seems to me to be 

 Ijeyond any doubt. True, the habitus-figure given by Kroyer in the work 

 of Gaimard does not show distinctly the characteristic dorsal process of the 

 urosome; but this may simply have been caused liy a mere negligence of tlie 

 lithographer. According to Dr. Hansen, all the specimens determined by Kroyer 

 as Pontoporeia femorata, and preserved in the zool. Museum of Copen- 

 hagen, have the «fork» very distinctly develojied. The P. furcigera of Bruze- 

 lius, of which I have had for examination numerous specimens from the 

 Stooklndm Museum, cannot, by an\- means, be specifically distinguished from 

 the form here described. 



Occurrence. — I have myself only met with this s^jecies off the coast 

 of Finmark in depths varying from 20 to 100 fathoms, muddy bottom. Occa- 



