162 BRITISH COPEPODA. 
2, PELTIDIUM INTERRUPTUM (Goodsir). Pl. LXXTI, figs. 
4—15. 
Sterope interrupta, Goodsir. Ann. and Mag. Nat. Hist., vol. xvi, 
pl. xi, fig. 10 (1845). 
Alteutha bopyroides, Claus. Die frei-lebenden Copepoden, p. 143, 
taf. xxii, figs. 10—17 (1863). 
— norvegica, Boeck. Oversigt Norges Copepoder, p. 48 
(1864). 
Body elongated, ovate, deeply incised at the junctions 
of the thoracic segments. Second joint of the female 
anterior antenna somewhat swollen, otherwise the organ 
in both sexes is nearly like that of the preceding species 
(figs. 4, 5). Second joint of the posterior foot-jaw 
(fig. 11) very short, the hand ovate and ciliated on the 
inner margin. Fifth pair of feet (fig. 14) extending 
beyond the middle of the abdomen, sword-shaped, — 
strongly spinous; three stout blunt spines —the 
middle one the largest—at the apex, and two on the 
external margin; one slender marginal seta near the 
middle. Caudal segments short and broad, armed 
with four setee, three of which are about as long as the 
seoment itself, and one about twice as long. Integu- 
ment (fig. 15) thick, porous, very opaque, variously 
coloured with dark yellowish or reddish brown; the 
caudal segments and the antenne pale. Jength synd — 
of an inch (1°1 mm.). eu 
This is a very common oceanic species all round 
our shores, but is only rarely met with between tide- 
marks. The female is at least as common as the 
male, although Dr. Claus had not met with a specimen 
