This publication describes new species found by Mr. Donald Megahan and his family while collecting at three Eocene, Cook Mountain Formation, Claiborne Group, localities in central Texas. The following eight new species are proposed: Pliciscala obliqua, Papuliscala keani, Conradconfusus nodulinus, Terebrifusus megahani, Orthosurcula ethani, Unitas duomillias, Ringicula taenia, and Syrnola debrae.

中文翻译：

---

基于 Megahan 收藏的德克萨斯始新世腹足纲的八个新物种

本出版物描述了 Donald Megahan 先生和他的家人在德克萨斯州中部克莱伯恩群的三个始新世库克山组中发现的新物种。提出了以下八个新物种：Pliciscalaobliqua、Papuliscala keani、Conradconfusus nodulinus、Terebrifusus megahani、Orthosurcula ethani、Unitas duomillas、Ringicula taenia和Syrnola debrae。