54 Cretaceous. 



ceramus sagensis, I. nehrascensis, and Cucullixa nebra&ceasis ^ now 

 Idonearco. nebrascensis. 



Dr. Joseph Leid}^* described, from the grcensand *of New Jersey, 

 Crocodilus dekayi.f 



Dr. Ferd. KoemerJ described, from the Cretaceous rocks of Texas, 

 Actfieoaella dolium, Am,monites dentato-carinatus^ A.Jlaccid/'costa, A. 

 guadalupoi^ Arcopagia texana^Astarte lineolata.Asiroco&niaguadahipai, 

 Avicula convexo-plana, A. pedernalis, A. planiiiscula, Caprina crassi- 

 Jihra, C guadalupce, Caprotina texana^ Cardium elegantuhim, now Lei- 

 opistha elegantula, C sanctisabce, Cheninitzia gloriosaj Cyphosoma 

 texaniim, Cypricardia texana, Diadema texanum^ Eulimci texana, 

 JSxogyra arletina^ E. Iceviuscula, E. ponderosa, E. texana^ Fusus 

 pedernalis, Glohiconcha coniformis, G. planata, Hemiaster texanits, 

 llippurites texanus, Holectypus ^?Z(??k/#».?, Homomya alta, Tnoceram- 

 us confer tlm-annulatus , I. undulato-plicatus^ Lamna texana, Lima 

 cremdi.costa, L. wacoensls, 3Iodiola concentrico-costellata, now Volsella 

 concentrlco-costellata, 3f. granulato-cancellata, now Crenella granulato- 

 canceUata,JI.pedernalis,novf Volselhi pedernalis, 3IonopIeura subtrique- 

 tra,3f. texana, 3Iytih(s semiplicatiis, M. tenuitesta, Natica pedernalis, 

 now Ltinatia pedernalis, iV. proigrandis, Nerinea acus, iV~ texana, 

 Urbitulites texaniis, now Tinoporus texanus, Ostrea anomiceformis, O. 

 crenuUmargo, O. aiicella, Pecten duplicicosta, now Neithea duplicicos- 

 ta, P. texana, now N. texana^ Pholadomya pedernalis, Psammobia 

 cancellato-sculptta. now Gari cancellato-sculpta, Radiolites austinensis, 

 Scalaria texana, now Anchura texana, Scaphites semicostatus, S. 

 tejanus, Solen irradians, Spondylas guadalupce, Terebratula guad- 

 alupce, T. wacoensis, To^aster texanus, Turrilites brazoensis, and 

 Turritella seriatim-granulata. 



In 1853, T. A. Conrad§ described, from San Felipe creek, near Rio 

 Grande, Texas, Exogyra caprina; from New Jersey, Avicula abrupta, 

 A. petrosa, Solenomya planidata, now Legumen planulatus, Crassa- 

 tella sub plana. Area uniopsis, Tellina densata, Lucina pinguis, now 

 Tenea pinguis, Pecten quinquenaria, now Neithea quinquenaria^ 

 Cardium protextum, Venilia rhomboidea, now Veniella rhomboidea, 

 Astarte parilis, Dentalium subarcuatum, Tnoceramits jierovalis, 

 Requienia senseni and Pholas pectorosa. 



* Jour. Acad. Nat. Sci., 2d ser. vol. 2 

 t Smithsonian Contributions, vol. 2. 

 I Kreid. von Texas. 

 'i Jour. Acad. Nat. Sci., 2d ser. vol. 2. 



