136 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



two submedian pairs of articulated short spines. The epimeral plates 

 of the first, second and third segments are broadly rounded, that of 

 the second segment being subcircular and overlapping both adjacent 

 segments; the epimeral plates of the fourth and fifth segments are 

 less deep and more posteriorly directed. The caudal fan has a brief 

 peduncular article, and an elongate-ovate inner blade which is a 

 trifle longer than the telson; the outer blade is a little wider and 

 longer than the inner and has a subdistal tooth on the outer lateral 

 margin. Both blades have a median longitudinal rib and ciliated 

 margins. 



The eye is set on a short, flexible, slender stalk; the cornea ter- 

 minal, spherical, large, with a large ocellus on the dorsal surface. 



The antennulae have the basal article excavate beneath the eye 

 with a lanceolate process on the outer lateral margin ; the second 

 article is short, cylindrical ; the third article shorter, but similar, and 

 giving rise to a thick coarse ring at the base of the long, outer flagel- 

 lum, which is broken off after the third ring, and a slenderer and 

 longer article at the base of the inner whip, which is broken off after 

 the thirtieth annulation. 



The antennae have a short basal article with a small, acute spine 

 on the outer distal angle; the second and third articles are slender, 

 cylindrical; the third, one and one-half times as long as the second 

 and reaching about two-fifths of the length of the scaphocerite, which 

 is exactly as long in the present specimen as the carapace is from 

 the orbital angle to its posterior margin ; the scaphocerite has its 

 outer margin thickened, terminating distally in an acute tooth; the 

 distal margin is unequally convex, the inner lateral margin being the 

 longer, and consequently the inner half of the distal margin is less 

 deeply rounded than is the other half. The flagellum is multiarticu- 

 late, in the present specimen being about one and one-half times the 

 length of the body. 



The first legs are slender, yet moderately robust in comparison with 

 the remaining pairs; the merus is elongated; the carpus slender, 

 about two-fifths as long as the merus, and the propodus has the palm 

 about three-fourths as long as the palm, the tips acuminate and set 

 with a tuft of bristles. 



The second legs are very long and slender, with a multiarticulate 

 carpus composed of about sixteen articles, of which the distal article 

 is twice as long as any of the others and has a weak chela. 



The third, fourth and fifth pairs of legs are similar, long, slender, 



