NOTES ON SOME RARE COPEPODA FROM SCOTLAND 235 
joint, and is provided with five sete, 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 sete, 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 setze 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 sete, one 
moderately long and stout and one very short ; the secondary joint 
is furnished with three moderately stout sete (Fig. 11). The 
caudal stylets are considerably shorter than those of the female, and 
the terminal setze 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 schmetlid was described and figured 
by Dr. Mrazek in the “Zoologische Jahrbucher” 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 sete instead of two, but 
