DACTYLOPUS. fi be 
in D. Stromw. The sete of the fifth feet (fig. 16) 
are, however, more irregular in length than in D. 
Stromu. Length 3'sth of an inch (‘9 mm.). 
A few specimens which I refer to this species were 
dredged off Portincross, Ayrshire, in a depth of fifteen 
fathoms, but nothwithstanding the careful examination 
which Dr. Claus has bestowed upon it, with the result 
of separating it specifically from D. Stromi, I must 
confess myself unable to see the propriety of that 
step. The preferable course would, I think, be to 
consider the present as a well-marked variety of what 
must be admitted to be a variable species. 
3. Dactytorus Srromi, Baird. Pl. LV, figs. 1—13. 
Canthocamptus Stromii, Baird. Brit. Entom. p. 208, pl. xxvii, 
| fig. 3 (not Canthocamptus Stromii of 
Lilleborg) (1850). 
Cyclops — Baird. Mag. Zool. and Botany (1837). 
Nauplius — Phillippi. Archiv fir Naturgesch., 
p. 69 (1843). 
Dactylopus cinctus, Claus. Die Copepoden-Fauna von Nizza, 
p. 27, taf. ii, figs. 8—12 (1866). 
Rostrum long and curved; anterior antenne 8- 
jointed, slender, plentifully beset with not very long 
hairs; the fourth joint bearing a long, curved, rod- 
like ‘‘olfactory” appendage (fig.1 a), the first four joints 
(peduncle) stouter than the rest, last jomt long and 
slender ; in the male (fig. 2) the first, second, and fourth 
joints are tumid, the third small and narrow, and there 
