Astro coenia Iwh ad'g n a4»* 7- 
not prominent. The margins are dentate, the dentations almost 
entirely destroyed in the type specimen, 
Bndothecal dissepiments present, thick and tabuliform. 
Columella not very strong, and not very prominent* 
Lv c ai i ty * ** Cat no dron-,' Xih Tt^dgo 'i* ov^cx - ' ^ 71 ' ' nmo ( "J 
; Island of Antigua (B. T . Hill, Collector) 
Geologic hor izon .— 
Tyne .---United States national Museumi 
