LIST OF ILLUSTRATIONS. 



TEXT FIGURES. 



Page. 



Three views of Lichanura oreutti, a new species of snake 96 



Views of Lichanura simplex, a new species of snake 97 



View of Lichanura trivirgata 97 



Head of Nesomimus macdonaldi, a new species of bird 103 



Head of Geospiza conirostris,& new species of bird 106 



Head of Geospiza media, a new species of bird 107 



Head of Cactornis brevirostris, a new species of bird 108 



Head of Gamarhynchus townsendi, a new species of bird Ill 



Head of Cainarhynchus pauper, a new species of bird Ill 



Views of Conotreta rusti, new genus and species of inarticulate brachiopod from the Trenton 



limestone 366 



Location of shell heaps of the Lower Potomac 368 



PLATES. 



I. New North American Acrididse : Dracotettix monstrosus, Thrincus aridus, Bobtettix 

 argentatus, Psoloessa Buddiana, CEdipoda occidentalis, Eritettix abortivus, Pedios- 



certetes pidchella, Mermiria texana 82 



II. Bones of Pallas's Cormorant; rostrum, mandible, and metacarpals 88 



III. Bones of Pallas's Cormorant; pelvis 88 



IV. Bones of Pallas's Cormorant ; coracoid, sternum, femur, tarsus, and tibia 88 



V. Gastropods ; Chrysodomus (Sipho) Rushii, Nassa scissurata, Conomitra intermedia, Co- 



lumbellapermodcsta, Mesorhytis costatus, Chrysodomus griseus, Pleurotoma exulans, 

 Calliotectum vemicosum, Terebra benthalis var. nodata, Chrysodomus amiantus, 

 Mangilia antonia 362 



VI. Gastropods ; Leucosyrinx Goodei, Pleurotomella cingulata, Leucosyrinxpersimilis, Pleu- 

 rotomella (Gymnobela) agonia, P. argeta, Fxisics ceramidus, Chrysodomus aphelus, 



Nassarina columbellata, Buccinum viridum 362 



VII. Gastropods; Murex (Chicoreus) Leeanus, Calliostoma platinum, Turticida Bairdii, 



Gaza Ralhbuni, Fusus ccpynotus, F. aleimus, Turcicula MacDonaldi 362 



VIII. Pelecypods: Verticordiaperplicata, Pectenglyptus, Poromya cymata, Cuxpidaria mono- 

 steira, Poromyamicrodonta, Lyonsiellaradiata, Poromya (Dermatomya) mactroides, 

 Cryptodon barbarensis 362 



IX. Gastropods and Scaphopods: Dentalium megathyris, ovicapsule of Scapella brasiliensis, 

 Solariclla infundibulum, Yolutilithcs Philippiana, Scaphella magcllanica, Ualis- 



tylus columna, Cadulus albicomatus 362 



X. Pelecypods: Callocardia (Vesicomya) Smithii, Lophocardium Annettce, Calloeardia 

 guttata, C. (Callogonia) Leeana, Malletia goniura, Cymatoica occidentalis, C. orien- 

 talis 362 



XI. Gastropods and Pelecypods: Pteronotus phaneus, Pecten (Pseudamusium) Strigillatum, 

 Euplcura Stimpsoni, CrassatcUa jloridana, Benthonella gaza, Maiginella cineracea, 

 Mitra Bairdii, Scala babylonia, Pecten effluens, Peristichia toreta, Oyclostrema cis- 



tronium 362 



XII. Gastropods: Haliotis Pourtalesii, Adeorbis sincera, Calliostoma Coppingeri, C. Rio- 

 ensis, Solariella oxybasis, Actceon perconicus, Solariella actinophora, Nassa Town- 

 sendi, Pleurotomella suffusa, Scaphander interruptus 362 



XIII. Pelecypods: Nucula cymella, Thracia Stimpsoni, Malletia (Tindaria) virens, M. (Tin- 

 daria) acinula, Leda, pontonia, Yoldia scapania, Leda cestrota, Toldia pompholyx. 

 Nucula callicredemna, Malletia (Tindaria) agathida, Cytherea encymata, Myonera 

 pancistriata, Cusptidaria (Luzonia) chilensis 362 



VII 



