1880.] NATURAL SCIENCES OF PHILADELPHIA. 1T9 



CAECINOLOGICAL NOTES, No. 3.— REVISION OF THE GENUS OCYPODA. 



BY J. S. KINGSLEY. 



The following paper is based on the Collections of the Academy. 

 I have observed the rule adopted in previous papers of following 

 the locality from which I have seen specimens, hy an exclamation 

 point. In all other cases the name of the person who has reported 

 a species from any place follows that of the locality. The same 

 conservative spirit which pervades m^^ paper on the " Fiddler 

 Crabs " (Gelasimi) will be found in this. Many of the characters 

 given by authors prove to be of no specific value, but I liave not 

 ventured to unite forms unless I had specimens which corre- 

 sponded to each nominal species. 



OCYPODA Fabiicius. 



Cancer I. c, Fabr. Ocypoda Fabr., Suppl. Eut. Syst.. 347 (1798) ; 

 Edw., Hist. Nat. Crust., 11, p. 41 (1837j ; Dana, U. S. Ex. Ex. 

 Crust., p. 324 (1853). 



Carapax transverse, rhomboidal or nearly square. Eyes stout, 

 the cornea occupjing the larger portion. Meros of external 

 maxillipeds shorter than ischium. Chelipeds unequal. 



In many species there is a stridulating organ composed of a 

 row of tubercles on the inner surface of the palm, which, by being 

 drawn across a ridge on the ischium of the cheliped, produces a 

 noise. 



§ 1. Ocular pedicels prolonged beyond the cornea as a spine 

 or style. 



1. 0. ceratophthalma Fabr. 



Cancer ceratoplithalmus Pallas, Splcelegia, p. 83, PI. V, f. 17(1772). 

 Ocypoda ceratophthalma Fabr., 1. c, 347 (1788) ; Latreille, Hist. 

 Crust, et Ins., vi, 47 (1803-4) ; Encyc. Meth., x, Pi. 274, f. 1 ; La- 

 marck, Hist. Aulmaux sans Vert., v, 252 (1818) ; Desmarest, Consid. 

 sur le Crustaces, 121, PI. XII, f. 1 (1825) ; Edw., Hist. Nat. Crust., 

 11, p. 48 (1837); III. Edit. Regne Animal, PI. XVII, f. 1 ; Ann. Scl. 

 Nat., in, xvlii, p. 141 (1852j ; Krauss, S. African Crust., p. 41 

 (1843) ; Btimpsou, Proc. Phlla. Acad., 1858, p. 100 ; Hess, Archlv. 

 fiir Naturgeschicbte, XXXI, 143 (1865); Martens, Verhandl. Zool, 

 Bot. Gesellsch. Wlen, 1806, p. 381 ; Heller, Relse Novara, Crust., p. 

 42 (1867) ; Hllgendorf In v. Decken's Relse, Crust., p. 82, 1867 ; 

 A. M.-Edw., Nouv. Arch, du Mus., Ix, p. 270 (1873). Cancer 

 cursor Herbst., PI. I, f. 8-9 (1790). Ocypoda brevicornis Edw., 



