226 U.S. NATIONAL MUSEUM BULLETIN 271 



Eusirus Kr0yer 



Eusirus Kr0yer, 1845.— Stebbing, 1906. 



Type-species: E. cuspidatus Kr0yer, 1845 (monotypy). See Sars, 

 1895. 



Accessory flagellum articulate, of medium size; lower lip with 

 inner lobes; inner plate of maxilla 1 with four or fewer terminal 

 setae; gnathopods eusirid, articles 4-6 not touching; pereopods 3-5 

 with articles 4-6 each not longer than article 2; antennal calceoli 

 absent (Eusiropsis) ; posterior border of gnathopod article 5 forming a 

 projecting lobe much narrower than length of tapered distal end of article 

 5 (Pareusirogenes). Species: 17, bipolar and tropical submergent, 

 primarily bathyal to abyssal. 



Harcledo J. L. Barnard 



Harcledo J. L. Barnard, 1964c. 



Type-species: Meteusiroides plumipes Birstein and Vinogradov, 

 1955 (original designation). Birstein and Vinogradov (1964) synony- 

 mized M. plumipes with M. curvidactyla (Pirlot, 1934). 



Accessory flagellum presumably absent; lower lip unknown, but 

 presumably with inner lobes; inner plate of maxilla 1 with four or 

 fewer terminal setae; gnathopods not eusirid, not distinctly sub- 

 chelate, article 6 tapering and with article 7 folded back on its setose 

 posterior edge, article 5 slightly lobate and shorter than 6; pereopods 

 3-5 with articles 4-6 each much longer than article 2. Species: 1, 

 N. W. Pacific, 73500 m (has eyes), possibly epipelagic. 



Harpinioidelld Schellenberg 



Harpinioidella Schellenberg, 1926a. 



Type-species: iiZ". ^mcaWa Schellenberg, 1926a (monotypy). 



[Accessory flagellum unknown]; lower lip with inner lobes; inner 

 plate of maxilla 1 with four or fewer terminal setae; gnathopods not 

 eusirid, simple, article 6 long, bent distally, article 5 much shorter 

 than 6, apparently lobate; [pereopods 3-5 unknown]. Species: 1, 

 antarctic to S. Atlantic, bathyal to ?abyssal (4,893 m), possibly 

 bathypelagic. 



Liouvillea Chevreux 



Liouvillea Chevreux, 1911c; 1912a; 1912b. 



Type-species: L. oculata Chevreux, 1912a (designated by Chevreux) ; 

 1912b. 



Accessory flagellum articulate, short; lower lip with inner lobes; 

 inner plate of maxilla 1 densely lined with setae on medial edge; 



