THE GRAPSOID CRABS OF AMERICA. 237 



GONIOPSIS CRUENTATA (Latreille). 



MANGROVE CRAB; TREE CRAB. 



Plate 57. 



Cancer ruricola de Geer, M6m. pour servir a. I'Hist. des Insectes, vol. 7, 



1778, p. 417, pi. 25 (not C. ruricola Linnaeus). 

 Grapsus crucntatns Latkeille, Hist. Nat. Crust., vol. 6, 1803, p. 70 (type- 

 locality, les lies de rAm&rique miridionale; type in Paris Mus.). 

 Gccarcimis ruricola IMacLeay, Trans. Zool. Soc. London, vol. 1, 1835, p. 184^ 



not G. ruricola (Linnaeus). 

 Grapsus (Goniopsis) crucntatus de Haan, Fauna Japon., Crust., 1835, 



p. 33. 

 Grapsus longipcs Randall, Journ. Acad. Nat. Sci. Philadelphia, vol. 8, 



1839 (1840), p. 125 (type-locality, Surinam; type in Mus. Phila. Acad. 



Sci.). 

 Goniopsis ruricola AVhite, List Crust. Brit. Mus., 1847, p. 40. — Saussuee, 



Mem. Soc. Phys. Hist. Nat. Gen6ve, vol. 14, 1858, p. 30, pi. 2, figs. 



18, ISffl. 

 Grapsus pelii Herklots, Addit. Faunam Afr. Occ, 1851, p. 8, pi. 1, figs. 6 



and 7 (type-locality, prope Boutry; type in Leyden Mus.). 

 Goniof/rapsus crucntatus Dana, U. S. Expl. Exped., vol. 13, Crust., pt. 1, 



1852, p. 342; atlas, 1855. pi. 21, fig. 7. 

 Goniopsis cruentata Rathbun, Bull. U. S. Fish Comm., vol. 20, for 1900, 



pt. 2 (1901), p. 15, pi. 1 (colored). 



Diagnosis. — Carapace quadrate, with one side tooth. Front ver- 

 tical. Antenna exchided from orbit. Fossa fringed with hair 

 between coxae of second and third legs. 

 Color yellow or red. 



Description. — Carapace widening a 

 little behind, sides a little curved, 

 branchial region swollen above the 

 level of the cardiac and intestinal re- 

 gions. Surface between ridges very 

 finely wrinkled. 



Median pair of frontal lobes a little ^ 



wider than outer pair. Surface of fig. 136.— goniopsis cnrEXTATA. 

 front tuberculate, lower edge nearly «' outer maxilliped, enlarged. 



'. . ^ "■ (after Milne Edwards) ; o, 



straight, thin, projecting, crenulate. left first appendage of abdo- 



Merus of chelipeds prominently l'^"" of^male (7677). lower 

 ridged; inner margin expanded in 



a broad lamina with edge coarsely dentate or spinate; outer mar- 

 gin with smaller teeth. Carpus tuberculate, inner angle armed with 

 a few denticles. Outer surface of chelae for the most part smooth 

 and flat, with rows of spiniform tubercles above and below; inner 

 face of palm sparingly tuberculate. Tips of fingers hollowed out 

 in shallow, inconspicuous spoons. 



The second or longest pair of legs is about twice as long as the 

 carapace. The merus joints of all the legs are about twice as long 



