52 BRITISH COPEPODA. 
vulvar aperture of the first abdominal ring. There | 
appears never to be more than one of these tubes 
attached to the same female, whereas in the ease of 
Temora and Diaptomus several of the spermatophores 
may be seen depending side by side from the vulva of 
the same individual. This difference, together with the 
peculiarly hard and rigid character of the attached body 
in the case of Canthocamptus, has induced Dr. Baird 
and other authors to doubt the spermatic nature of 
the tubes. I think, however, there need be no doubt 
on the matter; the tubes may indeed be seen in the 
interior of the male organism before their extrusion, 
just as is constantly noticed in the males of other 
Copepods. 
2. CANTHOCAMPTUS HIBERNICUS, nov. sp. Pl. XLVI, 
figs, 1—12. 
Anterior antenna (Pl. XLVI, fig 8) of the female 
slender, 8-jointed, about as long as the first body-seg- 
ment, and much like that of the preceding species. Inner 
branch of the second antenna (fig. 4) very small, 1- 
jointed. Posterior foot-jaw (fig. 7) having a broad hand 
armed with a long apical claw. Inner branch of the first 
pair of feet (fig. 8) scarcely twice as long as the outer ; 
first joint longer than the entire outer branch, and 
nearly twice as long as the united second and third 
joints, both of which are extremely small. Inner 
branches of the second, third, and fourth pairs shorter 
than the outer, and 3-jointed, the first joint being very 
