307 

 



cases confluent with the proximal one, inner expansion of the latter not produced. 

 A single ovisac present in female. 



Remarks. This genus was established in the year 1880 by Prof. Brady, 

 to include a peculiar Copepod, N. palustris, found by him off the British coast. 

 It was described and figured, but very imperfectly, in his well-known Monograph, 

 and was considered the type of a separate sub-family Nannopince, to which he 

 also referred a 2nd genus, viz. Platychelipiis. As stated above, the latter genus 

 ought to be included in the family. Laophontidce, and I find no reason for excluding 

 the present genus from the family Cletodidcv, exhibiting, as it does, all the essential 

 features of that family. Its nearest ally seems to be the genus Huntemannia, 

 from which however it differs pronouncedly in the structure of the legs and in the 

 presence of only a single ovisac in the female. The genus Ilyophilus of Lilljeborg is 

 identical with Brady's genus. It contains as yet 2 well defined species, one of 

 which belongs to the fauna of Norway, the other, N. perplexus G. 0. Sars, being 

 found in the great lake Tanganyika of Central Africa. 



202. Nannopus palustris, Brady. 



(PJ. CCIX). 

 .\ /mourns palustris, Brady, Monograph of British Copepoda, Vol. II, p. 101, PI. LXXVII, 



figs. 1820. 

 Syn: Ilyophilus flexibilis, Lilljeborg. 



Specific Characters. Female. Body very flexible with rather thin inte- 

 guments, and gradually tapering behind, all segments marked off from each other 

 by deep constrictions, and fringed at the posterior edge with fine spinules. 

 Cephalic segment rather expanded and occupying nearly half the length of the 

 anterior division, rostral plate broadly rounded at the end and densely fringed 

 with delicate cilia; lower edges of the segment likewise finely ciliated. Epimeral 

 plates of the 3 succeeding segments rounded aft. Last pedigerous segment, as 

 usual, without distinct epimeral plates. Urosome somewhat exceeding half the 

 length of the anterior division, last segment longer than the preceding one, and 

 slightly produced at the end between the caudal rami, anal opercle small and 

 perfectly smooth. Caudal rami about twice as long as they are broad, and scarcely 

 divergent, each with a slender bristle at about the middle of the outer edge, 

 middle apical seta about half the length of the urosome, and somewhat dilated in 

 its proximal part,- which is produced outside to a dentiform projection. Eye 

 rather large and conspicuous in the living animal, and of light red colour. Anterior 

 antennae about half the length of the cephalic segment, and gradually tapering 



