38 U.S. NATIONAL MUSEUM BULLETIN 236 



subfamilies of the Cyclopidae with the aid of the following key 

 (adapted from Kicfer, 1929): 



1. Terminal (or only free) segment of leg 5 of female bearing 4 appendages. 



Halicyclopinae Kiefer 

 Terminal (or only free) segment of leg 5 bearing 3, 2, or 1 appendages . . 2 



2. Terminal (or only free) segment of leg 5 of female with a total of 3 appendages. 



EucTCLOPiNAE Kiefer 

 Terminal (or only free) segment of leg 5 bearing 2 or 1 appendages. 



Cyclopinae Dana 



The subfamily Halicyclopinae at present includes the following 

 genera: Euryte Philippi, 1843 (type species E. longicauda Philippi, 

 1843), Halicyclops Norman, 1903 (type species Cyclops aequoreus 

 Fischer, 1860), N'eocyclops Gurney, 1927 (type species N. salinarum 

 Gumey, 1927) and Pareuryte Herbst, 1952 (type species P. remanei 

 Herbst, 1952). The genus Pareuryte Herbst is evidently identical 

 with Se well's genus Eurycyclops (Sewell, 1949, p. 36), to which genus 

 two species are attributed, E. magna Sewell, 1949, and E. parva 

 Sewell, 1949. Though none of Sewell's species is identical with 

 Herbst's Pareuryte remanei, both genera are clearly synonymous as 

 shown by a comparison of the descriptions of the genera in both 

 Sewell's and Herbst's papers. The type of Herbst's genus, by mono- 

 typy, is P. remanei; Sewell failed to indicate a distinct type for the 

 new genus Eury clops, the description of which was published in 1949, 

 with the result that, unfortunately, it cannot be accepted and must 

 be dropped in favor of Pareuryte Herbst, 1952. This genus con- 

 sequently contains the species P. remanei Herbst 1952 (type species), 

 P. magna (Sewell, 1949), and P. parva (Sewell, 1949). 



The genera of the subfamily Halicyclopinae can be distinguished 

 as follows: 



1. Leg 5 composed of a terminal segment and a basal part, more or less fused 



to the ventral surface of the 5th thoracic somite, leg 5 consequently com- 

 posed of 2 more or less free segments Halicyclops Norman 



Leg 5 composed of a terminal segment, an intermediate segment (bearing 

 an external seta) and a basal part, fused to the ventral surface of the 5th 

 thoracic somite 2 



2. Mandibular palp fully reduced; 9 with 8-segmented antennules. 



Neocyclops Gurney 



Mandibular palp, though more or less reduced, present. Antennules 12-21- 



segmented 3 



3. Mandibular palp present as a small, rounded eminence, bearing 3 well-devel- 



oped setae. 9 with 18- to 21-segmented antennules . . . Euryte Philippi 

 Mandibular palp present as a small, rounded knob, bearing 1 seta or 1 seta 

 and a very small spine. 9 with 12-segmented antennules. 



Pareuryte Herbst 



Representatives of only the genus Euryte occur in the present 

 collection. 



