NO. 1673. PARASITIC COPEPODS— WILSON. 447 



Genus Gangliopus. — Carapace elongate-elliptical, without coiispi- 

 cilla; genital segment enlarged, quadrangular, showing one pair of 

 legs; abdomen two-jointed, joints equal; anal laminjc small; legs all 

 biramose, rami of the first three pairs two-jointed, of the fourth pair 

 one-jointed; second maxilhi3 narrow and spine-like; second maxilli- 

 peds swollen, but whether with knobs or claws is not known. Here 

 belongs j^robably Gerstaecker's Nogagus angustulus found with females 

 of Gangliopus pyriformis. 



Genus Echthrogaleus. — Carapace wide elliptical, without conspicilla 

 or accessory lobes; second and fourth thorax segments lunate, the 

 fourth fitting down over the rounded anterior end of the genital seg- 

 ment; the latter oblong, enlarged, showing one pair of legs; abdomen 

 two-jointed, basal joint much the smaller; anal lamimv medium sized; 

 legs all biramose, exopods of the second and third pairs three-jointed, 

 other rami two-jointed; second maxillae narrow and spine-like; second 

 maxillipeds not much swollen, with terminal claw only. Here 

 belong — 



Certainly: Echthrogaleus hraccatus (male) Heller, 1865. 



Echthrogaleus perspicax (male) Thomson, 1889. 

 Dinematura neozealanica (male) Thomson, 1889. 



Probably: Pandarus armatus (male) Thomson, 1889. 



Genus Dinematura. — Carapace wide orbicular, without conspicilla or 

 accessory lobes; genital segment enlarged, oblong, no legs visible; 

 abdomen two-jointed, joints equal; anal laminae large; all the legs 

 biramose, rami of the first and fourth pairs two-jointed, of the second 

 and third pairs three-jointed; second maxilla slender, elongate, spine- 

 like; second maxillipeds moderately swollen, with a terminal claw 

 only, no knobs. Here belong — 



Certainly: Nogagus productus Gerstaecker. 



Dinematura latifolia, new male type. 

 Dinematura hamiltoni (male) Thomson. 



Probably: Dinematura elongata Beneden. 

 Nogagus gracilis Burmeister. 



Indeterminate. — Nogagus luetlxeMi Norman; Pandarus musteli- 

 Isevis (male) Hesse; Pandarus unicolor (male) Hesse; Pandarus 

 spinacii-achantias (male) Hesse. 



Belonging to the Eurypltoi^nse. — Nogagus erra/ns Kroyer; Nogagus 

 tnurrayi Brady. 



In order to complete this review of the Nogaus species so far as 

 present data will allow, each of the thirty-four forms just located 

 is taken up alphabetically in the following pages, and all available 

 information with reference to it is given. The five new male types 

 have, of course, never been referred to the genus Nogaus. 



