78_ 



as usual, flanked by 2 small bristles, the outer of which is connected with it 

 at the base. Anterior antennae of moderate size, not fully attaining the length 

 of the cephalic segment, with the first 2 joint comparatively short and combined 

 scarcely longer than the 3rd. Posterior antennae with the outer ramus very 

 small, bisetose. Natatory legs moderately slender, with the inner ramus in 1st 

 pair nearly as long as the outer, in the succeeding pairs much shorter; outer 

 ramus in the 2 anterior pairs without any setae inside, in the 2 posterior pairs 

 with a well developed seta on the middle joint and 2 such setae inside the 

 terminal joint, the latter joint unusually prolonged, exceeding in length the 

 other 2 combined. Last pair of legs largely developed and highly chitinised; 

 distal joint much elongated and provided with 5 exceedingly strong and densely 

 plumose setae, 3 on the outer edge, one at the tip, and one on the inner 

 edge near the end, each seta being "attached to a well defined knob-like 

 prominence; proximal joint with the outer digitiform process long and narrow, 

 inner expansion of the joint produced in the form of a narrow, somewhat 

 curved ramus densely ciliated inside, and extending along the distal joint until 

 its posterior Va part, outer part of the ramus armed with 4 slender spines. 



Colour not yet ascertained. 



Length of the specimen examined 0.55 mm. 



Remarks. The above described form agrees in almost all its details 

 so closely with the species recorded by Brady under the name of Cletodes 

 longicaudata, that I have been in much doubt, if it not more properly should 

 be referred to that species, in spite of its much inferior size 1 ). In any case 

 the specific name longicaudata cannot be retained for the present form, as 

 this name had been previously assigned by Boeck to another species of the 

 present genus (see Vol. V, p. 286). 



Occurrence. A solitary, apparently fully grown female specimen of 

 this form was found in a sample taken at Riser from a depth of about 

 30 fathoms. 



Distribution. ?British Isles (Brady & Scott). 



64. Cletodes perplexus, Scott. 



(PI. LIII). 



Cletodes perplexus, Scott, Seventeenth Annual Report of the Fishery Board for Scotland, Part III, 



p. 257, PI. XI, figs. 12-20; PI. XII, fig. 1. 



Specific Characters. Female. Body comparatively more robust than 

 in any of the preceding species, and tapering somewhat behind. Cephalic 



*) Brady gives the length to 0.79 mm., and Scott to no less than 0.84 mm. 



