13 



Page. 



Pecten x i 



Pinus edulis 91 



Polorthus 85 



tibialis 12 



Populus angustifolia 92 



monilifera . . 92 



Prosopis glandulosa 92 



Pterichthys 144 



Ptychoceras 94 



Pupa longurio 152 



Quercus Emoryi 91 



Ravenia Blandi 1 54 



Saturnia (Samia) Cecropia. . . 117 



Salizaria 92 



Scutellaria 92 



Sequoia 87 



Sigillaria 50 



Spermophila parva, n. sp 151 



Spiraxis 1 54 



Spirulasa rotula 12 



Page. 



Stenogyra octonoides 152 



Strophia 1 52-1 53 



Milleri 153 



uva 152-153 



Stylonurus excelsior 8 



Succineagyrata 1 51-152 



Terebratula plicata 10 



Harlani li, 85 



fragilis 1 1 



Trochosmilia conoides 12 



Tudora .151-153 



megacheila 151 



versicolor 152 



Ungnadia speciosa 92 



Unio 142 



Venericardia perantiqua 12 



Venus mercenaria 141 



Yucca angustifolia 93 



baccata 93 



Zonites petrophilus, n. sp. . . . 150 

 Wheatleyi, n. sp 150 



ERRATA. 



Page 3, nth line from top, for Asaphas, r<?iar^ Asaphus. 



" 8,9th and nth lines from bottom: for Stylomurus, read 

 Stylonurus. 



14th line from bottom : for graduation, read gradation. 

 6th " " " for Palorthis, read Polorthus. 



2d line from top : for Prozopis, read Prosopis. 

 6th " " " for monolifera, read monilifera. 

 I2';h " '' " for Tonquieria, r^a(5? Fouquieria. 

 i8th " " bottom: for Scutillaria, ri?rtrtf Scutellaria. 



50. 

 85. 

 92, 

 92. 

 92, 

 92. 

 92. 



17th " " " for Cardioz permum, read Cardio- 



spermum. 



93, 6th line from top : for vaccata, read baccata. 

 93,21st " " bottom: for Texamum, r^?(3:(^ Texanum. 



94, i8th " " " for Gryphea, r^a^ Gryphasa. 

 104, 5th" " " f or fortris, r^adT fortis. 

 151,14th" " top: for caniformis, r<?rt^ canifrons. 

 151,15th" " " for grivigula r(?«(3? griseigula . 



