458 Dr. 'J\ Scott on British Copepoda. 



three; second longer and wider than tlie third; wrist about 

 twice as long as the hand, whicii is oblong, setose on both 

 margins, palm transverse. The last three pairs o'i percpopods 

 have the first joints ])roadly ovate, the hind margins deeply 

 ferrate as in Podoprion^ Chevreux, and Podopi-ionrl/a, Sars. 

 Uropcds : first and second subequal in extent and scarcely 

 exceeding ti)e third pair ; the outer ramus in this pair has two 

 subequal joints and is but little longer than the inner. The 

 telsou could not be made out. 



The single specimen was not dissected; the mouth-parts 

 theret'ore could not be described. 



LXII. — Notes on British Copepoda : Change of Names, 

 By Thomas Scott, LL.D., F.L.kS. 



[Plate XL] 



Genus Piiyllopodopsyllus *, T. Scott, nov. 

 Syu. Tetrat/onicepa, T. Scott, in part, (not Tetragoniceios, G. S. Brady). 



Description. — Resembling Tetragoniceps, G. S. l^rady, in 

 form. Anterior antennae about as long as the cephalothoracic 

 segment and composed of nine joints, the second joint bearing 

 a more or less prominent hook-like spine, and the fourth 

 a tolerably elongated sensory filament. Posterior antennte 

 three-jointed ; outer ramus small, uniarticulate. Mandibles 

 small, biting-edge truncate and armed with several small 

 teeth ; palp tolerably large, basal joint with two, apparently 

 uniarticulate, branches, the distal branch being the longer. 

 First maxilli})eds five-jointed; first joint large and furnished 

 with a few marginal processes, other joints small. Inner 

 branches of the first four pairs of thoracic legs two jointed, 

 and the outer three-jointed. In the first pair the inner 

 branch is elongated, and the first joint longer than the entire 

 outer branch, the second joint is short. In the other three 

 pairs the outer branch is elongated, while the inner is very 

 short. The fifth pair are each composed of a large leaf-like 

 plate, and they together completely enclose the ovisac ; each 

 plate is provided with a few setai on the outer and distal 

 margins. The abdomen consists of five segments and has 

 the middle one produced distally on the underside into a 



* 0vXXoj/, a leaf; ttovs, a foot; ^j/vWcs, a flea: from the leaf-like 

 fifth pair of feet. 



