92 



Panama, and several other points on the Pacific coast, by Prof. F. II. 

 Bradley. 



Sesarma sulcata Smith, Trans. Conn. Acad., vol. ii, p. 156. Co- 

 rinto, Nicaragua. 



(?) Aratus Pisoni Edwards, Ann. des Sci. nat.. 3me ser., 1853, 

 tome xx, p. 187; Sesarma Pisoni Edw., Hist. nat. des Crust., tome ii, 

 p. 7G, pi. 19, figs. 4, 5. A specimen from Coriuto, Nicaragua, appears 

 to belong to this species, but it has not been carefully compared with 

 east coast specimens. 



Leucosoidea. 

 Leucosilia Jurinii Bell, Trans. Linn. Soc, vol. xxi, p. 295, pi. 32, 

 fig. 1, 1S55. Corinto and Bay of Realejo. 



ANOMOURA. 

 Dromidea. 

 Hypoconcha Panamensis Smith, Amer. Naturalist, vol. iii, p. 249, 

 1869. A large specimen from the Bay of Bealejo. 



PORCEELANIDEA. 



Ptrolisthes armatus Stimp., Ann. Lye. Nat. Hist., N.Y., vol. vii, p. 

 73, 1859. Gulf of Fonseca. 



Paouridea. 

 Clibanarius Panamensis Stimp., Ann. Lye. Nat. Hist., N. Y., vol. 

 vii, p. 84, 1859. Gulf of Fonseca. 



MACROURA. 

 Thalassinidea. 

 Gebia spinigera, sp. nov. Female. Median tooth of the rostrum 

 broad, triangular; lateral teeth, slender, spiniform, separated from 

 the median by deep sulci, which extend back nearly to the cervical 

 suture and leave, along the sides, sharp, narrow ridges armed with a 

 single line of spinules ; dorsal surface of the rostrum, two-thirds of 

 the way to the cervical suture, except a short median sulcus near the 

 tip, armed with sharp spines, which decrease in size posteriorly and 

 of which two at the tip are somewhat larger than the rest, and all 

 give rise to numerous short hairs. A slender spine on the anterior 

 border opposite the eye and just below the lateral spine of the rostrum ; 

 cervical suture marked by a deep sulcus which is bordered poste- 

 riorly, along the side of the carapax, by a slight ridge armed with 

 two or three short spines on the hepatic region ; cardiac and branch- 

 ial regions smooth and naked. Chelipeds equal ; ischium and merus 



