600 PROCEEDINGS OF THE NATIONAL MUSEl If. vol.38. 



PETROLISTHES POLITUS (Gray). 



PorceUana jmlita Gray, Zool. Misc., 1831, p. 15; Griffith's 

 Cuvier, Animal Kingdom, vol. 13, 1833, p. .'ill', pi. 25, fig. 2, 

 (Porcellaria) . Panama; Colon; West Indies. 



PETROLISTHES EDWARDSII (Saussure). 



PorceUana edwardsii Saussure, Rev. et Mag. de Zool. (2), 

 vol. 5, 1853, p. 366, pi. 12, fig. 3. Gulf of California to 

 Ecuador. 



PETROLISTHES GALATHINUS (Bosc). 



PorceUana galaihina Bosc, TTist. Nat. Crust., vol. 1, 1802, p. 233, 

 pi. 6, fig. 2. Panama; South Carolina to liio de Janeiro, 

 Brazil. 



PETROLISTHES TUBERCULATUS (Guerin). 



PorceUana tuberculata Guerin, Bull. Soc. Sci. Nat. France, 

 1835, p. 1 Hi; Mag. Zool., vol. 8, 1838. el. 7, pp. 6, 7, pi. 26, 

 fig. 2. San Lorenzo Island, Peru; Chile. 



PETROLISTHES TUBERCULOSUS (Milne Edwards i. 



PorceUana tuberculosa Milne Edwards, Hist. Nat. Crust., 

 vol. 2, 1837, p. 256. Peru; Chile. 



PETROLISTHES PATAGONICUS (Cunningham). 



PorceUana patagonica Cunningham, Trans. Linn. Soc. London, 

 vol.27, 1871, p. 405. Iquique, Chile; Port Otway, Pata- 

 gonia; Straits of Magellan. 



PETROLISTHES ACANTHOPHORUS (Milne Edwards and Lucas). 



PorcdhiiKi dcdiithophora Milnk Edwards and Lucas, d'Orbig- 

 iiv's \'oy. Amer. Mer., vol. 6, 1843, p. 33; vol. <>. atlas, 

 1847, pi. 16, fig. 2. Callao, Peru; Chile. 



PETROLISTHES ( ?) DESMARESTH (Eydoux and Gervais) . 



PorceUana desmarestii Etdoux and Gervais, in Guerin, Bull. 

 Soc. Sci. Nat. France, 1835, p. 115; Mag. de Zool., vol. 8, 

 1838, pp. 6, 7, pi. 26, fig. 1. Chile. 



PETROLISTHES (?) LiEVIGATUS (Guerin). 



PorcdhiiKi laevigata Guerin, Bull. Soc. Sci. Nat. France, 1835, 

 p. 115; Mag. de Zool., vol. 8, 1838, el. 7. pp. 5, <;. Ecuador; 

 1'ayta and Callao, Peru; Chile. 



Genus PACHYCHELES Stimpson. 



PACHYCHELES GROSSIMANUS (Guerin). See page 559. 



Peru: Chile. 



PACHYCHELES RUDIS Stimpson. 



Ann. Lye. Nat. Hist. N. Y.. vol. 7. 1859, p. 7(i, pi. 1, fig. 5. 

 Puget Sound to Lower California; Ecuador. 



