446 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



maxillBB flattened and laminate; second maxillipeds much enlarged 

 and armed with both claws and knobs. Here belong — 

 Certainly: Pandarus bicolor Scott, 1900. 

 Nogaus latreillii Leach, 1819. 

 Nogagus validus Dana, 1852. 

 Pandarus sinuatus, new male tyj^e. 

 Pandarus smithii, new male type. 

 Probably: Nogagus spinacii-achantias Hesse, 1883. 

 Genus Demoleus. — Carapace large, orbicular, without conspicilla or 

 accessory lobes; genital segment elongate, no legs visible dorsally; 

 abdomen two-jointed, joints unequal; anal lamiuie very large; legs 

 all biramose, rami, two-jointed; second niaxilh^ narrow and spine- 

 like; second maxillipeds not swollen, with a normal terminal claw 

 and no knobs. Here belong — 



Certainly: Caligus paradoxus Otto, 1828. 



Nogagus grandis Steenstrup and Liitken, 1861. 

 Probably: Dinematura musteli-lsevis Hesse, 1880. 

 Genus Perissopus. — Carapace elongate-elliptical, with conspicilla 

 and with minute accessory lobes; genital segment not enlarged, one 

 pair of legs visible in young specimens; abdomen one-jointed; anal 

 laminjie small; legs all biramose, rami of flrst three pairs two-jointed, 

 of fourth pair one-jointed; second maxillae short, slender, spine-like; 

 second maxillipeds much swollen, with a short, curved claw and 

 corrugated knobs. Here belong — 



Certainly: Perissopus communis, new male type. 

 Probably: Nogagus cselehs Heller, 1865. 



Pandarus crancliii Beneden, 1892 «. 

 Nogagus elcmgatus Heller, 1865. 

 Nogagus lunatus Steenstrup and Liitken, 1861. 

 Nogagus socialis Olsson, 1869. 

 Genus Nesippus. — Carapace acorn-shaped, short and wide, with 

 conspicilla, without accessory lobes; genital segment slightly enlarged, 

 efliptical, no legs visible dorsally; abdomen one-jointed; legs all bira- 

 mose, rami of first three pairs two-jointed, of fourth pair one-jointed; 

 second maxillae with enlarged and flattened basal joint and slender 

 terminal joint; second maxillipeds much enlarged, the terminal claw 

 flattened and laminate ; or with knobs onl}^ Here belong — 

 Certainly: Nogagus angustatus Beneden, 1892 h. 

 Nesippus alatus Wilson, 1905. 

 Nogagus horealis Steenstrup and Liitken, 1861. 

 Specilligus curticaudis Dana, 1852. 

 Nesippus orientalis Heller, 1865. 

 Probably: Pandarus affinis Beneden, 1892 a. 



Nogagus tenax Steenstrup and Liitken, 1861. 

 Nogagus hrevicaudatus Milne Edwards^ 1840. 



