112 Bulletin Vanderhilt Marine Museum, Vol. V 



the chelipeds and ambulatories, especially of the meral joints. The 

 male abdomen is five-jointed, segments three to five being fused. 



The chelipeds are distinctly unequal in both males and females. 

 The merus fits closely under the carapace only the distal margin be- 

 ing visible dorsally. The carpus is convex but with one or two dis- 

 tinct furrows or depressions, and with a strong tooth at the inner 

 angle; the palm is high, moderately convex on both outer and inner 

 surfaces, moderately rounded, smooth, except that the outer surface 

 has a series of wrinkles or depressions that form an almost longi- 

 tudinal furrow below the upper margin. The fingers are black, this 

 coloration extending very briefly and obliquely on the palm at the 

 base of the lower finger ; the tips are spoon-shaped, each with a sub- 

 distal tuft of bristles in the concavity. The fingers of the larger male 

 cheliped have a moderate elliptical gape and a few small rough teeth. 

 The fingers of the smaller cheliped meet and have each three or four 

 small teeth; both fingers have rudimentary longitudinal grooves on 

 their proximal portions. 



The ambulatories are compressed, subcylindrical, the meral joints 

 smooth, the carpus and propodus nearly smooth, each with a faint 

 groove on the upper surface; the dactyl is slender, longitudinally 

 grooved on each side, covered with coarse, squamose granules which 

 are mostly concealed beneath dense furry setae, the tip of the dactyl 

 is a strong curved horny claw with a groove on its under surface. 



The eye stalk is short, calcareous, dilated proximally, tapered 

 distally with none of the cornea visible dorsally; this being terminal 

 and lateral. 



The antennulae are short and stocky and fold nearly transversely; 

 they are separated by a stout septum. 



The antennae have the basal article oblong, touching the deflected 

 frontal margin at the inner angle and produced slightly farther at 

 the outer angle but not extending to the orbital angle ; the flagellum 

 is short, situated in the orbital hiatus and extending for only about 

 two-thirds the length of the orbit. 



The external maxillipeds have the distal margin of the merus 

 nearly transverse with a small triangular notch followed by a small 

 tooth near the anterior inner angle ; also a distinct pit-like depression 

 on the outer surface of the merus, near the base of the palp. 



References: Chlorodius exaratus H. Milne Edwards, Hist. Nat. 

 Crust., vol. I, p. 402, 1834; in Cuvier's Regne Anim., t. 17, p. 51, 



