287 



190. Cletodes Buehholtzi, Boeck. 



(PI. CXCVIII). 



Cletodes Buehholtzi, Boeck. Nye Slaegter og Arter af Saltvandscopepoder. Chr. Vid. Selsk. Forh. 



1872, p. 53. 



Specific Characters. Female. Body moderately slender and gradually 

 tapering behind. Cephalic segment about the length of the 3 succeeding segments 

 combined and having the lower edges evenly curved, rostral projection rather 

 broad, lamellar, with a distinct longitudinal keel on each side terminating in a 

 well-defined notch, tip broadly rounded and clothed with a dense fringe of delicate 

 cilia. Urosome shorter than the anterior division, all the segments (also the last) 

 acutely produced at the lateral corners. Caudal rami about the length of the 

 last segment and extending straight behind, outer edge exhibiting near the base 

 a well-marked notch carrying 2 somewhat unequal seta?, and having near the end 

 another stronger seta, dorsal seta issuing close to the base, middle apical seta 

 rather strong, being more than 3 times as long as the ram us itself; innermost 

 seta longer than the outermost. Eye very large and conspicuous in the living 

 animal. Anterior antennas very short and stout, though composed of the normal 

 number of joints, 3rd joint scarcely half as large as the 2nd, terminal part about 

 the length of the latter joint. Posterior antennae very strongly built, with the 

 basal joint somewhat flexuous, distal joint of about the same length, and armed 

 with 6 claw-like spines ; outer ramus, as in the other species, replaced by a single 

 ciliated seta. Oral parts of normal structure. Natatory legs comparatively more 

 fully developed than in the other species, and better adapted for swimming, both 

 rami coarsely spinulose and carrying at the tip long plumose setae; 1st pair re- 

 sembling in structure the 3 succeeding ones, though having the usual spine at the 

 inner corner of the 2nd basal joint. Last pair of legs with the distal joint com- 

 paratively small, narrow oblong in form, and provided with only 3 marginal setae, 

 the apical one much elongated; inner expansion of proximal joint linguiform in 

 shape, and extending far beyond the middle of the distal joint, being provided at 

 the end with 3 strong, somewhat curved setae increasing in length outwards. 

 Ovisac rather large, rounded oval in form. 



Body of a yellow colour, with dark translucent intestine. 



Length of adult female 0.71 mm. 



Remarks. This is a very distinct and easily recognisable form, being 

 especially distinguished by the peculiar shape of the rostral projection, the short 

 and thick anterior antennae, the form of the caudal rami, and the structure of the 

 last pair of legs. 



Occurrence. This form was observed, many years ago, by both Boeck and 



