124 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



occurs a rounded, slightly produced, lobe on the lateral margin, 

 beyond which the lateral margin is ciliate, oblique. 



The base of the uropoda is small, the inner lobe forming an acute 

 triangle, the outer lobe broadly convex. The inner blade is only 

 8 mm. long, narrow, tapering to a narrowly rounded apex ; the outer 

 blade is 11 mm. long and is wider than the inner blade; the longi- 

 tudinal groove is nearer the outer margin and extends obliquely, 

 terminating on the outer margin in a denticle, situated about one- 

 fourth of the length from the distal apex. Both blades are heavily 

 ciliated. 



The eyes are spherical, terminal and of much greater diameter 

 than the stalk which is short, very narrow basally, dilating moder- 

 ately distally. 



The inner antennae have the basal joint excavated cup-shaped 

 beneath the eye and ciliate on the inner proximal and distal margins 

 of this excavation; the second article is cylindrical, about as long 

 as the first; the third article is not quite as long as the second, and 

 convex, tapering distally like a truncated cone; the flagellem, which 

 is broken, retains 32 articles ; Faxon states that is quite long. 



The outer antennae have the bulbous basal article concealed beneath 

 the carapace and supporting the scaphocerite, which extends to mid- 

 way the length of the distal peduncular segment of the antennae, and 

 is rather wide, with a ridge along the outer lateral margin, terminat- 

 ing subdistally in a small, acute tooth; the distal margin is evenly 

 rounded, the inner lateral margin slightly convex, both heavily 

 fringed with plumose cilia. The smaller but dilated second and third 

 articles lie beneath the scaphocerite, extending midway its length; 

 the flagellum, broken in the present specimen, is said by Dr. Faxon 

 to be very fine and long. 



Synonymy. — Sergestes phorcus Faxon, Bull. Mus. Comp. Zool., vol. 

 24, p. 217, 1893. — H. J. Hansen, Sergestidae Siboga Exped. 

 Men., 88, pp. 7 and 10, 1919, Leyden. 

 Sergestes hisulcatus Faxon (not Wood-Mason), Mem. Mus. Comp. 

 Zool., vol. 18, p. 210, pi. 52, 1895. 



Sergestes robustus S. I. Smith. 



Plate 41. 



Type : The species was founded on four males, three of which were 

 taken by the IT. S. Bureau of Fisheries, off Martha's Vineyard, in 372 



