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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 102 



Diagnosis. — Eyes on short immovable stalks, preorbital lobes strong. 

 Pleotelson with two to three large 2-pointed setae on each side an- 

 terior to uropods. Body covered with setae, which are especially evi- 

 dent at posterior border of pleotelson. Flagellum of first antenna in 

 adult composed of three articles, last article about one-eighth length 

 of second and about two-thirds width of that article ; second and third 

 articles each with a sensory filament at apex. No suburopodal shelf 



Figure 50. — Munna stephenseni Gurjanova: a, Third pleopod, male; b, second pleopod, 

 male. (Magnification as indicated by scale.) 



evident. Ventral uropodal branch with a strong posteromedially di- 

 rected spinelike tooth at posteromedial angle, in addition to several 

 smaller teeth. 



Supplementary descriptive notes: 



Pleon. — Small specimens with two spinelike 2-pointed setae on 

 each side, large specimens with one more such seta on each side. 



First antenna. — Gurjanova describes two flagellar segments,^ the 

 second of which is long, and figures (enlarged drawing) a flagellum 

 composed of three segments (plus a very minute terminal article), the 

 long last article of her description being figured as two subequal 

 joints. In one of the specimens that I examined the flagellum of 

 the left antenna was composed of two articles, much as Gurjanova 

 describes (plus the minute terminal article, which Gurjanova did not 

 consider a separate article), while the right antennal flagellum re- 



2 Antenna 1 has a 2-jointed flagellum, with a large long last Joint" (Gurjanova, 1933, 

 p. 91). 



