Contents 



Each species in Ifaluk collection is illustrated except two denoted by dagger (f). 

 Related species, not in Ifaluk collection (and not illustrated), denoted by asterisk (*) . 



Page 



Introduction 3 



Collection localities 4 



Order Calanoida 7 



Family Centropagidae 7 



Genus Centropages Kr0yer 7 



C. orsinii Giesbrecht 7 



Family Pseudocyclopidae 8 



Genus Pseudocyclops Brady 13 



*P. crassiremis Brady 13 



*P. obtusatus Brady and Robertson 13 



*P. umbricatus Giesbrecht 14 



*P. magnus Esterly 14 



*P. latens Gurney 15 



*P. latisetosus Sewell 15 



*P. simplex Sewell 15 



*P. australis NichoUs 15 



*P. reductus NichoUs 16 



*P. gohari Noodt 16 



*P. cokeri Bowman and Gonzdlez 16 



*P, paulus Bowman and Gonzdlez 16 



*P. rostratus Bowman and Gonzdlez 16 



*P. rubrocinctus Bowman and Gonzd,lez 16 



P. paciUcus, new species 17 



Family Acartiidae 24 



Genus Acartia Dana 24 



A. tonsa Dana 24 



Order Cyclopoida 25 



Suborder Gnathostoma 25 



Family Oithonidae 25 



Genus Oithona Baird 25 



to. oculata Farran 25 



Family Cyclopinidae 26 



Genus Cyclopina Glaus 29 



C. steueri Friichtl .... 31 



C. brachysiylis G. O. Sars 32 



Family Cyclopidae 37 



Genus Euryte Phiiippi 39 



E. pseudorobusta, new species 40 



Suborder Poecilostoma 46 



Family Lichomolgidae 46 



Genus Macrocheiron Brady 46 



* Macrocheiron fucicolum Brady 47 



*M. mutatum Stock 47 



M. cheliferum (Thompson and A. Scott) 47 



V 



