228 Genera of Cyclopacea. ; 
Genus 4. Evcuteus, Dana. Anterior antenne many-jointed, with 
several long setz at intervals ; first pair of feet much larger than the 
maxillipeds, very long and. doubly geniculate, the apex flexed down- 
ward and furnished below with a pencil of naked sets ; motion of these 
organs forward in the line of the body, and not soe Posterior 
thoracic legs i in male very long, and the right one subcheliform. Beak 
pointed, in lateral view emarginate. 
. Posterior thoracic legs in the male large, the two unequal, and 
the ‘piel subcheliform; the right one of the anterior antennae in the 
same sex having a geniculating joint about one third its length from 
the a 
ai ciiek 5. Pontetta.* Anterior antenne multiarticulate, the sete 
as in Calanus. Maxillipeds much larger than the first pair of legs, not 
flexed, and having the terminal joints short and setigerous, the sete 
extending forward to the mouth and setulose, as in Acartia; the first 
pair of legs small and short, not prehensile. The right posterior tho- 
racic leg in the male oe cheliform, the left smaller and often simple. 
Beak fureate. Caudal sete more or less spread. (There is a large 
cay appendage under the head, with a rounded or reniform sum- 
mit 
Genus 6. Canpacta, Dana. Anterior antenne and posterior thora- 
cic legs, nearly as in Pontella ; the first pair of legs much larger than 
the maxillipeds, elongate, and flexed forward, with the extremity inflex- 
ed and bearing a pencil of long naked sete, motion in the line of the 
body. Front truncate ; caudal sete usually not prea Color often 
in part black or nearly so. : 
3. Palpi of the mandibles and mazille thuolote ; two simple 
eyes ? ; also two oblate lenses in the front, and two prolate lenses 
posterior to these within, which may constitute another pair of 
eyes. 
Family 4. Coryczipz. ‘Tentacles short, few-jointed ; exter- 
nal ovaries two. 
Genus 1. Corycxus,t Dana. Body not depressed. Abdomen ab- 
ruptly narrower than the body, 2 or 3-jointed; second pair of antenn® 
bas The name Pontia, applied to this group by Milne Edwards, was previously 
applied to a genus of insects, and has therefore been changed as above he ge- 
nas Cetochilus of Roussel de Vauzéme does not differ essentially from Pontella. 
two lenses in these animals are separated by an unobstructed space, and appear 
beyond doubt to serve for the transmission of light. In contact with the —— 
lens behind is an oblong spot of dark pigment. The only other supposition 
