Ill 



the end inside to 2 strong denticles, inner edge only very slightly setiferous, propodos 

 about half as long as the carpus, and much narrower, being constricted at the 

 base, and projecting at the end inside, to a rounded lobe. Ambulatory legs like- 

 wise rather strong, and resembling in structure those in 7I/. Kroycri. Uropoda, 

 like those in the said species, terminating in an incurved, hook-like point. 

 Colour very dark, nearly black. Length scarcely exceeding 2 mm. 



Remarks. This form, first recorded by Prof. Lilljeborg, is nearly allied 

 to M. Kroyeri, and indeed, I at first believed it to be the male of that species. 

 Having, however, subsequently had an opportunity of examining the male of M. 

 Kroyeri, I find it to differ in several points from the male here .treated of, and 

 I have therefore thought it right to retain Prof. Lilljeborg's species, though as 



j 



yet only known in one of the sexes. 



Occurrence. I have only seen a single specimen of this form, which was 

 taken off the coast of Jrederen from a depth of about 20 fathoms. Prof. Lillje- 

 borg found it at Christiansund. Out of Norway, it has not yet been recorded. 



Gen. 2. ParaiHUnna, G. 0. Sars, 1866. 



Generic Characters. Body short and stout, depressed, less narrowed be- 

 hind than usual. Cephalon rather large, and produced in front into 2 broad, 

 diverging lobes, laterally to well-marked ocular processes. Caudal segment com- 

 paratively short and broad. Eyes distinct, placed, as in Munna, on the tips of 

 pedunculiform lateral projections of the head. Antenna 1 comparatively small, the 

 inferior ones longer than the superior, with the peduncle 6-articulate and doubly 

 geniculate, outer appendage absent. Mandibles normally developed, with the molar 

 expansion subcylindric, and the palp distinctly 3-articulate, but rather small. 

 1st pair of legs short and stout, subcheliform, the others slender, ambulatory, 

 and but slightly increasing in length posteriorly, dactylus simple. Middle piece 

 of male operculum unusually large and expanded at the end. Uropoda extremely 

 small, biramous, somewhat removed from the tip of the caudal segment. 



Remarks.- This genus was established by the present author in the year 

 1866, to include a very small Isopod, which showed some points of agreement 

 with'-; *>Mnnna, though not sufficient to admit of its beilig combined with that genus. 

 It seems also to be rather nearly allied to the genus Lcptaspidia of Sp. Bate & 

 Westwood, though differing very prominently in the presence of well-developed, 

 pedunculated eyes, and in the uropoda being biramous, not simple. We know, as 

 yet, of only a single species, to be described below. 



