NO. 1177. NORTH AMERICAN LEPTONACEA— BALL. 883 



Genus ERYCINA Lamarck. 



28. Urycina whitfieldi O. Meyer, 1886 ; Claibornian. 



29. Erycina {ivMtfieMi var.) meyeri Cossmann, 1894; Claibornian. 



30. Erycina plicatula Jyekll; Claibornian. 



31. Erycina zitteli O. Meyer, 1887 ; Jacksonian. 

 33. Erycina undosaDolX; Oligocene, Florida. 



33. Erycina chipolana Dall; Oligocene, Florida. 



34. Erycina quaclrata Gabb, 1873; Oligocene, West Indies. 



35. Erycina fabulina Dall ; Oligocene, Florida. 

 3Q. Erycina curtidens Dall; Oligocene, Florida. 



37. Erycina carolinensis Dall; Miocene and Pliocene. 



38. Erycina americana Dall; Miocene, Maryland. 



39. Erycina marylandica Glenn; Miocene, Maryland. 



40. Erycina protracta Dall; Pliocene, Xorth Carolina. 



41. Erycina kurtzii Dall, 1898; Pliocene, Florida. 



Genus BORNIA Philippi. 



42. 5orwm 2^Wma Aldrich, 1897 ; Chickasawan. 



43. Bornia dalli Cossmann, 1894; Claibornian. 



44. Bornia dodona Dall; Oligocene, Florida. 



45. Bornia Jioridana Dall; Oligocene, Florida. 



46. Bornia mactroides Conrad, 1834; Miocene, Maryland. 



47. Bornia triangula H. C. Lea (MS.); Miocene, Pliocene. 



48. Bornia i'ota I) aW; Miocene, North Carolina. 



49. Bornia lioica Dall, 1898 ; Pliocene, Florida. 



50. Bornia mazycMi Dall, 1898; Pliocene, Florida. 



Genus KELLIA Turton. 



51. KeJlia species indet. ; Miocene, Maryland. 



52. Kellia laperousci Deshayes, 1839; Pleistocene, California. 



53. Kellia suhorbicularis Montagu, 1804; Pleistocene, Calilornia. 



Genus THECODONTA A. Adams. 

 1 Subgenus DICRANODESMA DaU. 



54. Thecodonta {Dicranodesma) calvertensis Glenn; Miocene, Maryland. 



Genus MYSELLA Angas. 



55. Mysella stantoni Dall; Miocene, North Carolina. 



56. Mysella stimpsoni Dall; Miocene, North Carolina. 



57. Mysella planidata Stimpson, 1851; Pliocene and Recent. 



58. Mysella boicmani Holmes; Pleistocene. 



• Genus ALVEINUS Conrad. 



59. AlveinHS minuttts Conrad; Eocene. 



00. Alveinus rotundus Dall; Chipola Oligocene, Florida. 



