309 



swimming power, as might also be guessed from the imperfect development of the 

 natatory setae on the legs. 



Distribution. British Isles (Brady), coast of France (Canu), shores of the 

 Baltic near Stockholm, and occasionally in fresh water (Lilljeborg). 



Gen. 66. POlltOpOliteS, Scott 1894. 



Generic Characters. Body short and stout, sub-cylindrical in form, with 

 the segments less sharply marked oft from each other than in most other Cletodidse. 

 Cephalic segment of moderate size, and produced in front to a comparatively small 

 rostral projection. Urosome scarcely at all attenuated behind, genital segment in 

 female imperfectly subdivided; caudal rami short and thick. Anterior antennae 

 short, 5-articulate, and clothed with slender setse, some of which are ciliated; 

 those in male strongly hinged. Posterior antennae moderately strong, outer ramus 

 biarticulate and attached near the base of the proximal joint. Mandibular palp 

 slender, biarticulate, with a slight rudiment of an outer ramus. Maxillae and 

 maxillipeds normal. 1st pair of legs differing conspicuously from the 3 succeeding 

 pairs, inner ramus well developed, extending beyond the outer, and biarticulate. 

 Inner ramus of the 3 succeeding pairs very small, uniarticulate. Last pair of legs 

 with the distal joint quite confluent with the proximal one, both forming together 

 a broad transverse lamella fringed behind with long setse. A single ovisac present 

 in female. 



Remarks. This genus, established by Th. Scott, differs somewhat, it is 

 true, from the other Cletodidae, both as regards the outward appearance of the 

 body and the structure of some of the appendages. I think, however, that it 

 will more properly find its place in the present family, as the antennae and legs 

 are built essentially upon the same type as in the other members of this family. 

 It contains as yet only a single species, to be described below. 



203. Pontopolites typicus, Scott. 



(PI. OCX). 



Pontopolites typicus, Th. Scott, Additions to the Fauna of the Firth of Forth. Twelfth Ann. 

 Rep. of the Fishery Board for Scotland. Part III, p. 251, PI. VIII, figs. 917. 



Sped /i<- ('Itft-ntf-h'rx. Fi'iiiiil<\ Body very short and compact, of nearly 

 uniform width throughout, all the segments quite smooth. Cephalic segment 



