\m ""■' ■J2^ 



CONTENTS OF VOI.. IX 

 Bull, No. Page 



37 —New Eocene Species from Alabama. 



By T. H. Aldrich Pi's 1-3 1-32 



38 — Recent Mollusca of the Gulf of Mexico 



and Pleistocene and Pliocene 

 Species from the Gulf States. 

 Part 2. — Scaphopoda. Gastropoda. 

 Amphineura and Cephalopoda. 

 By C. J. Maury 33-173 



39 — ^^The Miocene of Northern Costa Rica 



with Notes on its General Strati- 

 graphic Relations. 

 By A. A. Olsson Pi's 4-35 174-482 



