THE ANXALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[SIXTH SERIES.] 

 No. 70. OCTOBER 1893. 



XL. — On some new or rare Crustacea from Scotland. By 

 Thomas Scott, F.L.S., Naturalist to the Fishery Board 

 for Scotland, and Andrew Scott. 



[Plates XI.-XIII.] 



COPEPODA. 

 Diosaccus propinquuSy sp. n. (PI. XI. figs. 1-6.) 



Female, — Length, exclusive of caudal setffi 1 millim. (^V of 

 an inch). Body moderately robust. Anterior antennte eight- 

 jointed, the first four joints stout, subequal, the last four 

 slender ; the combined length of the last four is equal to 

 nearly two thirds of the combined length of the first four ; 

 the proportional lengths of the joints are shown by the 

 formula — 



14 . 14 . 12 . 15 . 8 . 12 . 5 ■ 9 



1 2 3 4 5 6 7 8' 



Posterior antennae comparatively short and stout, secondary 

 branch two-jointed (fig. 3). Mandible-palp one-branched, 

 two-jointed as in Di'osaccus tenuicornis (Claus), but the end 

 joint is much narrower than, and only about a third of the 

 length of, the basal joint. The maxillas and anterior foot- 

 jaws are nearly as in Diosaccus tenuicornis. The posterior 

 foot-jaws are stout and the terminal claw is as long as the 

 Ann. & Mag. K Hist. Ser. 6. Vol. xii. 19 



