22 Bulletin, Yanderhilt Marine Museum, Yol. II 



with their lateral margins similar to those preceding; the posterior 

 margin relatively straight in the median line and convex on each side ; 

 the sixth segment is shorter than the others with a transverse flat 

 carina along the anterior margin and with six large, thick, longitud- 

 inal tubercles, subequally spaced and terminating in an acute denticle 

 posteriorly; the outermost one on each side being more acuminate 

 than those adjacent. The telson has the proximal part elevated and 

 ornamented with three thick elongate tubercles ; there is also a small, 

 round granule at the base and slightly outside of each of the long, 

 outer tubercles ; the distal telsonic margin is cut by a median V-shape 

 sinus on either side of which is a triangulate, acuminate tooth with 

 its inner lateral margin denticulate, its median dorsal surface with a 

 heavy, node-like carina ; a small, short tooth on the outer side of this 

 large tooth at the base, and then another large tooth, its upper surface 

 with two, prominent, thick ridges, its outer margin carinate, notched 

 near the base forming a small tooth from which the heavy, carinate 

 lateral margin extends back as a ridge to the base of the telson. 



The uropoda are very strong, the peduncle with a small spine at 

 the base of the outer blade ; the produced inner process slightly longer 

 than either blade of the telson, the outer angle produced into a longer, 

 sabre-like tooth, which is separated from the similar but shorter acum- 

 inate tooth of the inner angle by a deep, V-shape sinus. The outer 

 blade is thick, irregularly shaped, with a rounded node at the base of 

 its inner lateral margin, an oblique ridge on its upper surface and 

 with eleven strong, acuminate, movable spines of unequal length along 

 its outer lateral margin, and one double spine at its outer distal angle ; 

 the distal article of the outer blade is very small, oval, nearly sub- 

 circular, ciliate; the smaller inner blade is narrow, long, both lateral 

 margins convex but unequal to each other, distal margin rounded; a 

 strong, oblique, longitudinal carina near the outer lateral margin; 

 entire margin ciliated. 



The eyestalk is very short, cylindrical, the cornea dorso-terminal, 

 convex, about as long as the stalk and of approximately the same 

 width ; composed of very fine facets. 



The antennulae have the peduncular joints slender, clavate, ap- 

 proximately subequal, the three together being twice as long as the 

 eye ; the flagellum is short, stocky, the upper whip being one and one- 

 half times as long as the third peduncular article ; the lower flagellum 

 is two-branched, its upper branch being one and two-thirds times as 



