carrying one apical and one lateral seta. Mandibles with the masticatory part 

 divided into a number of delicate flattened teeth, palp uniarticulate, but exhibiting 

 one or 2 small lateral lobes. Maxillae and maxillipeds of normal structure. Na- 

 tatory legs comparatively short, with both rami densely spinulose at the edges, 

 and more or less incurved, carrying at the tip long and slender setae, outer ramus 

 with the spines of the outer edge very long, but without any setae inside, inner 

 ramus biarticulate; 1st pair only slightly differing from the 3 succeeding ones. 

 Last pair of legs with the distal joint rather coarse and, like the inner expansion 

 of proximal joint, armed with strong spiniform setae; those of male not much 

 reduced in size. Ovisac single. 



Remarks. This genus was rather insufficiently characterised by Boeck, 

 and for this reason was not recognised by succeeding authors. Boeck himself 

 referred to this genus 2 species which are evidently not congeneric, the one, 

 E. longicaudata, having indeed turned out to be a true Cletodes, described above 

 as Cletodes longicaudatus. The other species, E. curticauda, which of course must 

 be regarded as the type of the present genus, has recently been redescribed by 

 Th. Scott under another name as a species of the same genus. On the other 

 hand, Prof. Brady describes, under the name of Cletodes propinqva, a species which 

 is evidently congeneric with the type of Boeck's genus Enhydrosoma. Finally, 

 the form referred by the same author to the latter genus, E. curvatum, is very 

 different from both these genera, constituting the type of a particular genus. It 

 appears from this, that great confusion prevails among authors as regards the 

 present genus, the exact characters of which I have tried to draw up in the above 

 diagnosis. 3 well-defined species referable to this genus will be described below. 



197. Enhydposoma eurticaudatum, Boeck. 



(PI. CCV). 



Enhydrosoma curticauda?) Boeck, Nye Slsegter og Arter af Saltvandscopepoder. Chr. Vid. Selsk. 



Forh. 1872, p. 54. 



Syn: Cletodes hirsutipes, Scott. 



Specific Characters. Female. Body somewhat robust, rapidly tapering 

 from front to back, with the segments somewhat raised dorsally, and, viewed 

 dorsally, quadrangular in form. Cephalic segment large and tumid, equalling in 

 length the 3 succeeding segments combined, rostral projection terminating in 2 

 recurved points. Urosome much shorter than the anterior division, last segment 



l ) Enhydrosoma being a neuter, the specific name must be spelt as above. 



