Boone, Crustacea, Cruise of ''Alva," 1931 117 



cavity on which there is a prominent, submargined nodule. The an- 

 terolateral margin is widely rounded and cut into five prominent 

 nodular teeth. The dorsal surface of the carapace is conspicuously 

 areolated, the convex gastric lobes are circumscribed and separated 

 from each other by a median nulcus ; the branchial region of the cara- 

 pace on either side of the gastric lobes is divided by deep, anasto- 

 mosing sulci into about six distinct lobes, each of these, the four outer 

 lobes are inside of, and separated from the first to fourth anterolateral 

 teeth respectively, while the fifth and sixth lobes occur on the inner 

 branchial region. There is a deep, slightly irregular, transverse 

 sulcus, arising between the fourth and fifth anterolateral teeth and 

 extending entirely across the carapace, and emphasi2;ed by the uro- 

 gastric pits. The posterior region of the carapace has the intestinal 

 region faintly outlined, emphasized posteriorly by a submedian pit on 

 either side, and with posterior margin a flat carina. The lateral walls 

 of the carapace adjacent to the legs are nearly covered with coarse 

 shaggy setae. The male belt is very narrow and consists of five seg- 

 ments; the third, fourth, and fifth being fused. The female belt is 

 seven segmented, oval, moderately wide, with very setose margins. 



The chelipeds are conspicuously unequal in both sexes, with the 

 upper and outer surface of the wrist convex but roughened and pitted, 

 and with a distinct tooth at the inner angle. The hand is smooth on 

 the outer surface but with a definite submarginal, longitudinal groove 

 below the upper surface and with this upper surface roughened by 

 pittings and fine, irregular, low wrinkles. 



The fingers are black in both sexes, this black extending obliquely 

 backward for a short distance on the hands in the larger males. The 

 fingers of the larger male cheliped are widely gaping, meeting only 

 at the hollowed tips and armed with several feeble teeth. In the 

 smaller cheliped the gape is less, the entire cutting edges of both 

 fingers serrate with teeth only the tips of which scarcely touch. In 

 the female, the fingers of both chelipeds have almost no gape, both 

 cutting edges being regularly serrate. 



The ambulatories are smaller, with the merus subcylindrical and 

 grooved ; the carpus short and grooved, and the propodus short, granu- 

 lose; the dactyl covered with rounded coarse tubercles, beneath the 

 thick coating of furry setae, and tipped with a sharp claw. 



References: Chlorodius sanguineus H. Melne Edwards, Hist. Nat. 

 Crust, t. I, p. 402, 1834.— Dana, Proc. Acad. Nat. Sci. Phila., 



