CONTENTS 



Introduction 1 



Acknowledgment 2 



Source of Materials 3 



Method of Study 5 



Method of Treatment 6 



Summary of Additions and Changes 8 



Recorded Specimens incertae sedis 9 



Systematic Discussion 10 



Family PORCELLANIDAE 10 



Genus Orthochela Glassell 13 



Ort/iochela pumila GlasseW 14 



Genus L'topetrolisthes, new 16 



Liopetrolisthes mitra (Dana) 17 



Genus Petrolisthes Stimpson 21 



Petrolisthes sanfelipensis Glassell 30 



Petrolisthes agassizii Faxon 32 



Petrolisthes edivardsii {Saussure) 33 



Petrolisthes galathinus (Bosc) 36 



Petrolisthes glasselli Haig 39 



Petrolisthes polymitus Glassell 41 



Petrolisthes desmarestii (Guerin) 43 



Petrolisthes hirtispinosus Lockington 45 



Petrolisthes marginatus Stimpson 47 



Petrolisthes armatus (Gibbes) 50 



Petrolisthes nobilii, new species 55 



Petrolisthes robsonae Glassell 57 



Petrolisthes hirtipes Lockington 60 



Petrolisthes nigrunguiculatus Glassell 62 



Petrolisthes tuberculatus (Guerin) 64 



Petrolisthes tuber culosus {H-M^iXnt^A-wnxA?,) 66 



Petrolisthes tiburonensis Glassell 70 



Petrolisthes rathbunae Schmitt 72 



Petrolisthes eriomerus Stimpson 74 



Petrolisthes manimaculis Glassell 77 



Petrolisthes gracilis Stimpson 79 



Petrolisthes tridentatus Stimpson 81 



Petrolisthes galapagensis, new species 84 



V 



SMITHSONIAN ...^ « 

 INSTITUTiON MAR 8 



