698 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



ANALYTICAL KEY TO GENERA. 



1. Three thorax segments fused with the head; the fourth segment only free 2 



1. Only the first thorax segment fused with the head, the others free; no dorsal 

 plates; all the swimming legs biramose, the rami three-jointed. 



Dissonus Wilson, 1906, p. 716. 



2. One or more pairs of legs uniramose, the others biramose 3 



2. All four pairs of swimming legs biramose 4 



3. First legs only uniramose, their terminal claws curved and simple; sette on anal 



lamiufe short and non-plumose Caligeria Dana, 1 852. 



3. First and fourth legs uniramose; claws on first pair straight and three-parted; 

 setse on anal lamimie long and plumose. 



(rlolopotes Steenstrup and Liitken, 1861, p. 698. 



4. Exopod of fourth legs three- join ted, endopod two-jointed 5 



4. Both rami of fourth legs with the same number of joints 6 



5. Setae on fourth legs plumose; firstabdomen joint much larger than second and covered 



with a dorsal wing or with two lateral wings Euryphorim M. -Edwards, 1840. 



5. Setfe on fourth legs non-plumose; abdomen joints about the same size, without 



wings Eli/trop]iura Gerstaecker, 1853. 



6. Rami of fourth legs small, the two joints fused; rami of first three pairs two-jointed, 



without horny processes Dysgamus Steenstrup and Liitken, 1861, p. 712. 



6. Fourth legs rudimentary, hidden; exopods of first three pairs with horny proc- 

 esses Alebion Kroyer, 1863, p. 702. 



Genus GLOIOPOTES Steenstrup and Lutken. 



Carapace large, oval, shield-shaped. Frontal plates wide and dis- 

 tinct, without lunules; first antennas slender and two-jointed, like 

 those of Caligas. Mouth tube short and wide; second maxillae bifur- 

 cate and flattened, but not laminate, as in Pandarus. Furca com- 

 pound. Fourth thorax segment free, with two dorsal plates which 

 cover a portion of the genital segment. First and fourth thoracic legs 

 uniramose, second and third biramose; terminal claws on the first legs 

 three-parted. 



Genital segment large, produced backward in the female on either 

 side of the abdomen in the form of an elongated, curved process, car- 

 rying a serrated, styliform appendage on its outer border. Genital 

 segment in the male without posterior proceses, but having the styli- 

 form appendages attached directly to its sides. Abdomen slender and 

 two- jointed; anal laminae elongate and filiform. Egg-cases and eggs 

 as in CaJlgus. 



{yXoiog^ knavish, and nori^^^ a drinker or tippler.) 



ANALYTICAL KEY' TO THE SPECIES. 



1. Dorsal plates on the fourth segment short and rounded, covering only a little of 



the genital segment 2 



1. Dorsal plates elongate, rectangular, covering all the genital segment except the 



processes hygomiarnis Steenstrup and Liitken, 1861. 



2. Dorsal plates semilunate, longer than wide; first antennae concealed ; abdomen 



smooth huttoni (Thomson, 1889). 



2. Dorsal plates much wider than long; first antennae prominent; abdomen heavily 

 armed with spines along the sides ornatus Wilson, 1905, p. 699. 



