Boone, Crustacea, Cruises of ''Eagle" and "Ara," 1921-28 133 



tions ; one blunt tooth at the lateral angle ; frontal margin bent down 

 almost vertically, median lobe wide, truncate, separated from the small 

 lateral lobes by a wide, U-shaped notch. Chelipeds rather massive. 



Type: Herbst's type came from the Carolina coast of the United 

 States and is deposited in the Berlin Museum. 



Distribution. — ^Known from Miami, Florida, southward in the Ba- 

 hamas, Porto Rico, "West Indies, to Brazil, at Goyanna, Stone Reef 

 and Fernando Noronha. A reef -dwelling species. 



Material examined: One species taken at Cape Haitien, Haiti, 

 March, 1928, by the "Ara," William K. Vanderbilt, commanding. 

 Color plate made of this specimen by W. E. Belanske. One speci- 

 men taken at Turtle Harbor, Florida, 1923. 



Color: Mr. Belanske 's color sketch, which is the first authentic 

 sketch of this species made from the living animal, shows the upper 

 surface of the carapace ruby red, marbled with yellow. The tips of 

 the chelipeds are brownish-black, as are also the dactyli of the am- 

 bulatories. 



Technical description : Carapace oval, regularly convex in all 

 directions ; the interorbital margin is less than one-third the width of 

 the carapace; the frontal margin deflected almost vertically; the 

 median tooth wide, truncated and separated from the lateral lobe by 

 a wide, U-shaped sinus ; the lateral lobe is small, rounded, its margin 

 thickened ; the superior orbital margin is entire, thickened, forming a 

 well-defined, blunt tooth at the postorbital angle. The anterolateral 

 margins are wide and broadly and evenly convex, a prominent, blunt 

 tooth occurs at the lateral angle, the postlateral margins are obliquely 

 convergent ; the posterior margin is straight. The male abdominal belt 

 is five-segmented ; the third and fourth segments being entirely fused 

 without even a suture line ; the fifth segment is fused immovably with 

 the fourth but retains a suture line indicating the fusion. The female 

 belt is seven-segmented. 



The eyestallc is stocky, short, the cornea small, terminal. 



The antennulae fold obliquely within the fossett. 



The antennae have the basal articles flat, long, extending into an 

 oblique cleft between the frontal margin and the infraorbital plate; 

 the flagellum is small, equal to less than the length of the orbit and 

 situated in the orbital cleft. 



The external maxillipeds have the distal border decidedly oblique. 



