of the Fishery Board for Scotland. 



325 



Remarks. — The species now described may be distinguished by the 

 structure of the elongate swimming feet and by the form of the fifth pair. 

 Since the discovery of this species in Scotland it has been obtained also 

 in Lancashire by my son, Mr A. Scott. 



Moraria brevipes (G. 0. Sars). 



This species, which, under the name of Ophioeamptus brevipes, was 

 recorded for the first time in Part III. of the Thirteenth Annual Report 

 of the Fishery Board for Scotland, from specimens obtained in Loch 

 Lubnaig, Perthshire, was discovered last year in Rescobie Loch and Loch 

 Balgavie, near Forfar. It appeared to be more frequent in these two 

 lochs than it was in Loch Lubnaig. These are yet, so far as I know, the 

 only British habitats for this Copepod. The form and armature of the 

 fifth pair of feet, taken together with its other characters, clearly distin- 

 guish this from other British fresh-water Harpactids. 



Moraria Poppei (Marazek). (PI. IX. figs. 13-20). 



1893. Ophioeamptus Poppei, Mrazek, 'Beitrag zur Kenntniss 

 der Harpacticiden Fauna des Siisswassers ' (Zool. Jahrb., 

 Siebenter Band), p. 114, taf. 5, figs. 54-59. 



Description of the Female. — Length, '59 of an inch). Dorsal aspect 

 of body narrow, cyclindrical (rig. 13). Antennules short, seven- 

 jointed, joints sub-equal. The formula shows the different lengths of the 

 joints of the specimen figured : — 



Proportional lengths of the joints, . 10 '7'5'6'Q'6'8 

 Number of the joints, . . . 1~ 2 ■ 3 • 4 • 5 * 6 • 7 



Antennae short and stout, secondary branch one-jointed and furnished 

 with three setae (fig. 15). Mandibles well developed, palp comparatively 

 large and two-jointed (fig. 16). Posterior foot-jaws strongly clawed. 

 The first joint is also armed with a setiferous spine on the inner distal 

 angle (fig. 17). First four pairs of swimming feet short, inner branches, 

 two outer branches three-jointed. In the first pair the inner branches 

 are nearly as long as the outer branches, and the first joint is stouter than, 

 and nearly twice the length of, the last joint (fig. 18). In the next three 

 pairs the inner branches, which are shorter than the outer branches, have 

 the joints sub-equal. The outer branches of the fourth pair are pro- 

 portionally rather longer than those of the first, and are fully twice the 

 length of the inner branches (fig. 19). The basal joint of the fifth pair is 

 comparatively large and sub-triangular in form, and bears several small 

 setae round the distal end. The secondary joint is very small (fig. 20). 

 Caudal stylets stout, about as long as the last abdominal segment. 



Habitat. — Side of Loch Fad, Bute ; rare. 



Remarks. — The above description and drawings had been prepared 

 before I happened to observe the close resemblance between this Copepod 

 from Loch Fad and Ophioeamptus Poppei described by Herr. Aid. 

 Mrazek, who discovered that species in a brook in the forest at St Ivan, 

 Pribram, Bohemia. Further study of the characters of the two forms 

 leaves no doubt in my mind as to their identity. The similarity of the 

 form and armature of the fifth feet is remarkably close ; even the curved 

 setae at the apex of the basal joint are similar in the specimens from Loch 

 Fad and in those from St Ivan. 



