Urocopia singularis G. O. Sars. Y 
differs conspicuously from the other known Lichomolgidæ. The 
very peculiar structure of the caudal rami is even among Copo- 
poda quite an unique character, and moreover the absolute want 
of any rostral prominence, the anomalous structure of the 2 
pairs of antennæ and partly also that of the legs afford charac- 
ters distinguishing this form rather prominently. On the other 
hand are the oral parts quite normally developed, and are in real- 
ity far less different in structure from those in the typical genus 
Lichomolgus than is the case with those in some of the other 
genera included in the said family. As the structure of the oral 
parts is generally recognised to be in the first place conclusive 
by the systematic determination, no hesitation can arise in class- 
ing the present form within the family Lichomolgidæ. The above 
mentioned differences are however great enough to warrant its 
validity as the type of a new well-defined genus, the chief cha- 
racters of which may be given as follows: — 
Gen Llirocopia, G. ©. Sars. 
Body comparatively slender, with the two chief divisions 
sharply marked off from each other, the anterior club-shaped, the 
posterior very narrow. Cephalic segment with a well-marked trans- 
versal suture dorsally, front truncated, without any trace of a 
rostrum. Tail with the normal number of segments. Caudal rami 
of quite an unusual appearance, being very large, oarblade-shaped 
and greatly divergent. Anterior antennæ comparatively short and 
stout, with the number of joints reduced. Posterior antenne 
simple in structure and almost naked, terminating in a short claw- 
like spine. Oral parts quite normally built. Natatory legs with 
the rami equal-sized, their spines very large, dagger-like, with 
serrated edges; inner ramus of 4th pair distinctly 3-articulate 
with the terminal joint narrow and smooth on both edges. Last 
pair of legs quite rudimentary. 
As to habits, the present Copepod seems to differ essenti- 
ally from the other known Lichomolgidæ. None of these lead a 
pelagic existence, but are found near the shores either parasitic 
on various bottom-animals, for instance Tunicata, Worms, Echi- 
noderms, or freely among alge and other marine growths. The 
occurrence of the present form, on the other hand, in a gathering 
taken in the open sea at a considerable distance from the bottom, 
clearly stamps it as a true pelagic animal. In this respect it agrees 
with the members of 3 other families of poecilostomous Cyclo- 
