234 ANNALS OF SCOTTISH NATURAL HISTORY 
of two marine Copepods that have been added to the British 
fauna within the last year or two. 
We first describe the species from Loch Leven. 
CANTHOCAMPTUS SCHMEILII, A/vazek, Plate IV. Figs. 1-13. 
1893. Canthocamptus schmeddi, Myrazek, “ Beitrag zur Kenntniss 
der Harpacticidenfauna des Stisswassers” (‘‘ Zoologische 
Jahrbiicher,” Siebenter Band), p. 116, Taf. VIL. Figs. 
IO7-I17. 
Descriprion.—/emale.—Length .8 mm. (s4 of an inch), The 
cephalothoracic segments serrated on the posterior margins both 
dorsally and laterally ; the abdominal segments with the posterior 
edges serrated only on the dorsal aspect, while laterally they are 
fringed with sete ; the whole integument of the thorax and abdomen 
covered with minute hairs. The antennules (anterior antennz) 
somewhat shorter than the first cephalothoracic segment, and eight- 
jointed: the fifth and seventh joints are shorter than any of the 
others, the seventh only about half the length of the end joint. 
The proportional lengths of all the joints are shown by the annexed 
formula :— 
Proportional lengths of the Joints 13 13 14 12 8 11 6 12 
Number of the Joints 1 2:5: 3 4 ONGi aor 
The secondary branches of the antennze (posterior antennze) are 
two-jointed: the first joint bears one seta, but the end joint is 
furnished with two terminal setee—one slender, and one stout and 
spiniform (Fig. 4). The mandible-palp consists of a single very 
small joint and bears two terminal hairs. The inner branches of 
the first pair of swimming feet are considerably longer than the 
outer branches, they are two-jointed, the first joint reaches to about © 
the end of the outer branches, the second is equal to about three- 
fourths of the length of the first joint, and is also more slender and 
provided with two apical seteze—one very long, the other about half 
the length ; the marginal spines of the outer branches are moderately 
stout and elongate; a moderately stout spine springs from the 
interior distal angle of the second basal joint, and extends to about 
the middle of the first joint of the inner branches (Fig. 5). The 
inner branches of the second, third, and fourth pairs are also two- 
jointed and much shorter than the outer branches, and the first 
joint of all the inner branches of these three pairs is considerably 
shorter than the second joint; in the fourth pair the inner branches 
are furnished with only one seta, which is terminal and spiniform 
(Fig. 6). The secondary joint and the inner produced part of the 
basal joint of the fifth pair are subquadrangular in outline: the 
secondary joint does not extend much beyond the end of the basal 
