78 



the exposed part of the trunk and rather deep, with a strongly marked carina 

 running on each side, nearer the dorsal side, from the hindmost part of the 

 branchial regions to the base of the pseudorostral projection, the latter rather 

 prominent, acute, subrostral corners very small, terminating in a minute denticle. 

 Tail (excluding the terminal appendages) shorter than the anterior division. Su- 

 perior antenna with the peduncle scarcely projecting beyond the tip of the pseu- 

 dorostral projection, its 2nd joint rounded oval, with 3 blunt serrations of the 

 inner edge, last joint extremely small. First pair of legs about the length of the 

 carapace, ischial and meral joints forming together a rather short and broad 

 triangular piece intercalated between the basal and carpal joints, the latter joint 

 very large and broad, forming an oblong quadrangular plate, to the outer corner 

 of which the 2 small distal joints are very movably attached. Second pair of 

 legs scarcely more than half as long as the 1st, antepenultimate joint rather 

 broad, and of same appearance as the preceding one, terminal joint conically 

 tapered, with several long bristles at the tip. Uropoda about the length of the 

 last 2 caudal segments combined, inner ramus somewhat larger than the outer, 

 and almost twice the length of the stem, with only 3 spinules, 2 apical and one 

 lateral, inner edge minutely serrate and densely hairy throughout. Colour uni- 

 formly yellow, without any pigmentary ornament. Length about 4 mm. 



Adult male much more slender than the female, with the anterior divi- 

 sion less vaulted above. Carapace with an additional carina on each side, 

 running parallel to the other and nearer the ventral side; pseudorostral projection 

 shorter and blunter than in female. Appendages exhibiting the usual transfor- 

 mation. Length nearly 5 mm. 



Remarks. This form was originally described from only 2 specimens, 

 both of the female sex, the one not fully developed; and owing to this scantiness 

 of material, some errors had been introduced in the original diagnosis. Thus 

 the 1st pair of legs are described as only 5-articulate, whereas in reality, they 

 are composed of the normal number of joints, 2 of them, however, the ischial 

 and meral ones, being so firmly connected as to exhibit the appearance of a 

 single ioint. The eye, which was stated to be wholly wanting, is in reality 

 present in its usual place, though in a rather imperfect condition. Moreover, 

 the extremely small and rudimentary exopodites on the 3rd and 4th pairs of 

 legs were at that time overlooked. The characters of the male, too, could of 

 course not be given. 



Occurrence. -The 2 specimens from which the original description was 

 made, were taken off the Lofoten Islands in a depth of 50 60 fathoms, on a 



