oj the Fishery Board for Scotland. 143 

 SUB-ORDER CYCLOPOIDA. 



Fam. Cyclopia. 

 Genus Euryte, Philippi (1843). 



Etiryie longicauda, Philippi, var. minor. PI. x., figs. 13 and 14. 



Euryte lonyicauda is a moderately common species, and has already 

 been recorded from the Firth of Forth and other places. Two forms, a 

 smaller and a larger, have occasionally been observed, but they appear to 

 differ very little from each other except in size. Figures 10 and 13 on 

 plate x. show a female of the usual size and one of the small variety. 

 The first measures about l*2mm. and the other '8mm. in length ; the 

 drawings of them are similarly enlarged. But though they differ so 

 distinctly in size, there appears to be scarcely any structural difference 

 between them ; for convenience sake, however, the small form might be 

 distinguished as var. minor. The fifth foot in this variety is slightly 

 different in shape and armature from that of the other, as shown by 

 figures 12 and 14. Both of the forms represented here are from South 

 Bay, Firth of Forth. 



SUB-ORDER HARPAC ITCOIDA. 

 Fam. Longipediid^ 

 Genus Longipedia (1863). 



Longipedia coronata, Clans. PI. x., figs 15-17. 



Prof. G. 0. Sars has shown that the Longipedia usually recorded from 

 Scottish waters as Longipegia coronata, Claus, was not the species 

 described by him under that name, but another and quite distinct form 

 to which he has given the new name of Longidepia Scotti* The true 

 L. coronata, Claus, appeals to be moderately rare in our seas, and is pro- 

 bably limited to moderately deep water. I have only observed it in two 

 gatherings, and they were on each occasion collected in over fifty 

 fathoms. Longipedia coronata, Claus, which is scarcely so large as 

 L. Scotti shows several minute points of difference from the other species, 

 i.e., the arrangement of the three prominent setae on the long end-joint of 

 the inner branches of the second pair of legs in the female is similar to 

 that of L. minor, Scott, but there are short stout spine-like processes at the 

 distal end of the basal joints of the outer and inner branches (fig. 15). 

 The fifth pair of feet, though similar to those of L. Scotti, are slightly 

 different in form and armature (fig. 16); while the last segment of the 

 abdomen bears two short stout spines on each side of the prominent 

 medium spine on the posterior dorsal margin (fig. 17). 



Habitat. — Moray Firth, off Fraserburgh, September 29, 1904, 

 collected by Dr. H. C. Williamson, to whom I am indebted for the 

 specimens. The same species was also obtained in one of the "Gold- 

 seeker " gatherings, and is recorded in the Bulletin of the Council of the 

 International Bureau for November, 1904. 



*Sars' Crustacea of Norway, vol. v., p. 11, pi. v., fig. 1 (1904). 



