26 



BIBLIOGRAPHY OP 



Owen (Rich.). Vertebra of reptiles figured and compared with 

 those of mammalia. — Philos. Trans,. R. Soc. L. Part II. 

 1851, 740. (176 



Owen (D. D.). Description of new and imperfectly known gonera 

 and species of organic remains coliccted during the geologi- 

 cal surveys of Wisconsin, Iowa, and Minnesota. — Owen's 

 Rep. 1852. Appendix, 573. 1 (171 



Trilobites. Straparollus (Euomphalus) rain- 



Asaphus (Isotelus) iowensis. [aesotensis. 

 Crepicephalus (n. g.). [sus. Acepiiala. 

 Dikelocephalus (n. g.) granule- Cucullaea nebrascensis. 



iowensis. Inoceramus nebrascensis. 



minnesotensis. sagensis. 

 miniscaensis. Brachiopoda. 

 pepinensis. [waensis. A try pa comis. 

 Loncbocephalus (n. g.) cbippe- Clionetes granulifera. 



hamulus. 

 Monoeephalus (n. g.). 



Cephalopoda. 

 Ammonites cheyennensis. 



lenticularis. 



moreauensis. 



nebrascensis. 



opalus. 

 Discites tuberculatus. 

 Gyroceras burlingtonensis. 

 Scapbites comprimus. 



nodosus. 

 Gasteropoda. 

 Pleurotomaria muralis. 



? iowensis. 

 Leptcena trilobata. 

 Lingula ampla. 



pinnaformis. 

 Orbicula prima. 

 Ortbis enneata. 

 Productus nebrascensis. 

 Spirif'er cedarensis. 



euruteines. 



inoequicostatis. 



iowensis. 



ligus. 



pennatus. 

 Fobaminifera. 

 Selenoides (n. g.) iowensis. 



Owen (D. D.) and Shumard (B. F.) Descriptions of one new 

 genus and twenty-two new species of Grinoidea, from the 

 subcarboniferous limestone of Iowa. — Owen's Rep. 1852. 



' (172 

 Megistocrinus (n. g.) Evansii. 



Appendix, 587. 



Actinocrinus unicornus. 

 Agassizocrinus conicus. 

 Cyatbocrinus cornutus. 



iowensis. 

 Dichocrinus ovatus. 



striatus. 



Pentremites laterniformis. 

 melo. 



Norwoodii. 

 stelliformis. 

 Platvcrinus americanus. 



