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189. Cletodes longicaudatus (Boeck). 



(PI. CXCVII). 



Enhydrosoma longicaudata, Boeck, Nye Slsegter og Arter af Saltvandscopepoder. Chr. Vid. Selsk. 



Forh. 1872, p. 54. 



Syn: Cletodes neglecta, Scott. 



Specific Characters. Female. Body slender, cylindric in form, or very 

 slightly tapering behind. Cephalic segment comparatively short and broad, scarcely 

 attaining the length of the 3 succeeding segments combined, rostral projection 

 triangular, narrowly blunted at the tip. Urosome (including the caudal rami) fully 

 as long as the anterior division, the 3 anterior segments acutely produced at the 

 lateral corners, last segment about the length of the preceding one. Caudal rami 

 very narrow and produced, linear in form and slightly diverging, nearly attaining 

 the length of the last 2 segments combined; dorsal seta issuing about in the middle, 

 apical seta scarcely longer than the ramus itself. Anterior antennae of moderate 

 size, with the 3rd joint about the length of the 2nd, but narrower. Posterior an- 

 tenna of exactly the same structure as in the other species. Oral parts and legs 

 likewise agreeing closely with those in the type species. Last pair of legs only 

 differing from those in C. limicola in the distal joint being somewhat less produced. 



Male, as usual, smaller than female, and having the anterior antennas 

 strongly hinged. Inner ramus of 3rd pair of legs not transformed. Last pair of 

 legs much smaller than in female, distal joint with only 2 comparatively short 

 apical setae; inner expansion of proximal joint obsolete, without any seta3. 



Colour whitish grey, with a slightly yellow tinge. 



Length of adult female 78 mm. 



Remarks. This form has been erroneously referred by Boeck to his genus 

 Enhydrosoma. It is in reality a genuine Cletodes, and closely allied to the type 

 species, Cletodes limicola Brady, from which it is readily distinguished, however, by 

 its more slender body and especially by the narrow and produced caudal rami. 

 Prof. Brady has described under the name of Cletodes longicaudata a very differ- 

 ent form, which perhaps does not belong to the present genus at all. The form 

 recorded by Th. Scott as Cletodes neglecta is unquestionably identical with Boeck's 

 species. 



Occurrence. I have found this form in considerable abundance at Farsund, 

 south coast of Norway, in a depth of about 20 fathoms, muddy sand. It also 

 occurs occasionally in the upper part of the Christiania Fjord. 



Distribution. Scottish coast (Scott). 







