347 



riorly -pointing, acute projections; last segment of raetasome with a somewhat 

 upturned lamellar expansion at the end dorsally. Cepnalon about the length 

 of the first 2 segments of mesosome combined, and produced in front to a 

 moderately large and rather broad rostral projection, blunt at the tip; lateral 

 corners rectangular, postantennal ones exserted to a rather projecting spini- 

 form process. Coxal plates not very large; 1st pair tapering distally to a 

 blunt point, and having posteriorly, at a short distance from the tip, 3 small 

 serrations ; 2nd pair more bluntly rounded at the tip, and exhibiting 4 serra- 

 tions posteriorly ; 4th pair but little deeper than the corresponding segment, 

 posterior projection acutely produced, hind margin below the latter straight 

 and very oblique; 5th pair more than twice as broad as they are deep, 

 posterior lobe obtusely truncated at the tip. Last pair of epimeral plates 

 of metasome produced at the lateral corners to a spiniform, slightly upturned 

 projection, posterior edge straight and very finely serrulated. Eyes of 

 moderate size, irregular oval in form, pigment dark red. Superior antennas 

 exceedingly elongated, nearly attaining the length of the whole body, 1st 

 joint of the peduncle about the length of the other 2 combined, flagellum 4 

 to 5 times as long as the peduncle, and composed of a great number of 

 articulations, the 1st of which is by far the largest. Inferior antennae scarcely 

 half as long as the superior, the last 2 joints of the peduncle nearly equal- 

 sized, flagellum about twice as long as the peduncle. Gnathopoda compara- 

 tively feeble in structure, the posterior ones a little stronger than the anterior, 

 carpus in both pairs rather elongated, and but very slightly expanded at the 

 end inferiorly, propodos about the length of the 2 preceding joints combined, 

 and oblong oval in form, gradually widening, somewhat, distally, palm shorter 

 than the hind margin, and only defined below by a very slight, obtuse angle, 

 its edge smooth, having only, somewhat above the middle, a small dentiform 

 projection, hind margin provided with from 5 to 6 transverse rows of small spines, 

 besides a number of slender hairs. Pereiopoda rather elongated, but compara- 

 tively strongly built, and densely edged with tufts of small spines, basal 

 joint of the 3 posterior pairs oblong oval in form, with the posterior edge 

 slightly serrulated, dactylus in all pairs strong and curved. Last pair of 

 uropoda rather slender, outer ramus exceeding half the length of the inner. 

 Telson very small, viewed from above, oval in form, with a small dentiform 

 projection on each side near the tip. Body whitish, semipellucid, and more 

 or less densely mottled with a dark brownish pigment. Length of adult 

 female reaching 17 mm, 



Remarks. - - There cannot be any doubt that the above described form 

 is the true Kroyerian species. Through the kindness of Dr. Hansen, I have had 

 an opportunity of examining the Greenlandic specimens in the Museum at 



