NOTES ON SOME RARE COPEPODA FROM SCOTLAND 235 



joint, and is provided with five sets, four at the apex and one on 

 the outer margin, the middle seta is short, but the others are 

 elongate and plumose ; the inner produced part of the basal joint 

 is also furnished with five setae, all of which are plumose and 

 arranged as shown by the drawing (Fig. 10). Caudal stylets narrow, 

 subconical, and equal to about three-fourths the length of the last 

 abdominal segment : they each bear a long spiniform terminal seta 

 and several very small hairs (Fig. 12). 



Male. Fig. 3 in the plate is a drawing of one of the male 

 antennules, which are strongly hinged, as shown. In the male the 

 second pair of swimming feet have the inner branches slender and 

 two-jointed : the second is of considerable length, and reaches to 

 nearly the end of the outer branches (Fig. 7). The inner branches 

 of the third pair are three-jointed, the first two joints are short, but 

 the second joint has the inner angle produced into a long spiniform 

 appendage that extends considerably beyond the end of the third 

 joint (Fig. 8). In the fourth pair the inner branches are two-jointed, 

 and scarcely longer than the first joint of the outer branches : the 

 two terminal setae are bent inwards at an obtuse angle, which seems 

 to be the normal position of them ; the second joint in the outer 

 branches is not only armed with a stout, elongate, and somewhat 

 curved spine, but has also the exterior distal angle produced into a 

 strong, conical, and slightly bent tooth-like process (Fig. 9). The 

 male fifth pair are much smaller than those of the female : the basal 

 joint is only slightly produced interiorly, and bears two setae, one 

 moderately long and stout and one very short ; the secondary joint 

 is furnished with three moderately stout setae (Fig. n). The 

 caudal stylets are considerably shorter than those of the female, and 

 the terminal setae are more elongate (Fig. 13). 



Habitat. Amongst mud by the shore at the west end of Loch 

 Leven, Kinross-shire; collected, June 1890. 



REMARKS. Canthocamptus schmcilii was described and figured 

 by Dr. Mrazek in the " Zoologische Jahrbiicher" in May 1893, 

 from specimens obtained by him in two different localities in the 

 neighbourhood of Pribram, in Bohemia, in 1891-92. The species 

 is quite distinct and easily recognised. The peculiar angularity of 

 the specimens is so characteristic that they can be identified with 

 certainty with an ordinary hand-lens. The species differs from its 

 nearest allies by the elongate form of the two-jointed inner branches 

 of the first pair of swimming feet. The female also differs further 

 in the form of the fifth pair of feet and of the caudal stylets, and the 

 male in the structure of the inner branches of the second, third, and 

 fourth pairs of feet. Dr. Mrazek in his description appears to have 

 inadvertently taken the fourth pair of the male for the second, and 

 he also represents the inner produced part of the basal joint of the 

 male fifth pair as furnished with three setae instead of two, but 



