826 



GEOLOGY 



Fig. 553. MIOCENE GASTROPODS (one Scaphopod): a, TurritcUn w 

 Conrad; 6, Scala sayana Ball; c, Nassa marylandica Martin; </. / 

 unilineata Conrad; e, Solarium trilineatum Conrad; /, Cancellarw 

 allernata Conrad; g, Surcula biscatenaria Conrad; h, CcUliosloma i>lnlnn 

 thropus (Conrad); i, Actceon shilohensis Whitfield; /, Oliva liltrrn 

 Lamarck; k, Retusa (Cylichnind) conulus (Deshayes); I, Conns <liln 

 vianus Green; m, Polynices (Neverita) duplicatus (Say); n. 

 (Continued at bottom of page 827.) 



