182 PROCEEDINGS OF THE ACADEMY OF [1880. 



external three-fourths nearly straight and directed slightl}^ back- 

 wards. Lateral angles nearly right angles, the sides behind them 

 being concave for about a fifth of the length of the carapax ; 

 oi'bits with a deep median fissure below. Eyes with a short conical 

 stjde reaching to, or slightl}^ beyond, the angle of the orbit. 

 External maxillipeds nearly smooth, or with a few inconspicuous 

 granules. Meros of larger cheliped with the upper and lower 

 margins spino-tuberculate, the posterior with transverse rugaj. 

 Carpus granulate ; hand subspinose above, finely serrate below, 

 internally granulate and with a well-marked transverse stridulat- 

 ing ridge, fingers lamellate, the extremities truncate. 



Chili \ Guerin ; Panama ! Capt. Field and McNiel (Pliila. Acad.) ; 

 Gulf of Fonseca ! McNiel (Peab. Acad.) ; Callao(E6.vf. et Lucas) ; 

 Valparaiso (Dana). 



6. 0. fabricii E Iw. 



Oei/podafabricii 'Edw., Hist. Nat. Crust., 11, p. 47 (1837), Ann. Sci. 

 Nat. XVIII, p. 143 (1853), Hilgendorf in Decken's Reise Crust., 83, 

 PI. Ill, f. 1 (1867). 



Carapax convex, finely granulate, front strongly deflexed, 

 orbits strongl}' sinuate ; lateral angles acute and some distance 

 posterior to the base of the rostrum ; sides parallel for about a 

 third of the lengtli of the carapax. Orbits witliout emargination 

 below ; e3'es with a short conical style, not reaching beyond the 

 orbital angle. Anterior margin of mei*os of larger cheliped cren- 

 ulate, distally spinose, posterior margin rounded, rugose. Carpus 

 granulate, as is the outside of the hand ; inner surface of the 

 hand polished, with minute scattered granules ; stridulating ridge 

 straight, composed of small, closelj'' set granules ; lower margin 

 of hand finely serrate ; fingers of moderate length. Joints of 

 ambulatory feet with transverse rugoe. 



Australia ! E. Wilson; Natal ! E. Wilson ; Oceanica (Edw.) ; Zan- 

 zibar (Hilgendorf), 



7. 0. cursor. 



Cancer cursor Linn., Syst. Nat. Edit., xii, p. 1039 (1766). Ocypoda 

 ippeus Olivier, Voyage, p. 334, PI. XXX, f. 1 (1807); Savigny, Egypt, 

 PI. I, f. 1; Lamarck, An. sans Vert., v, p. 353 (1817); Desm., Con- 

 sid. Crust., p. 131 (1835); Edw., Hist. Crust., ii, p. 47 (1837); Mose- 

 ley, Notes by a Naturalist on the Challenger, pp. 48-49, woodcut, 

 1879. Ocypoda cursor DeHaan, Fauna Japonica, Crust., p. 89; Edw., 

 Ann. Sci. Nat., Ill, xviii, p. 143 (1853); Stm., Proc. Phila. Acad., 

 1858, p. 100; Heller, Crust. S. Europa, p. 99 (1863). 



