18 



BULLETIN 90, UNITED STATES NATIONAL MUSEUM. 



Dr. T. Wayland Vaiighan has kindly consented to give the follow- 

 ing brief list of the corals of the Orthaulax zone, identified by him, 

 the report on which is now awaiting publication. 



LIST OF SPECIES. 



Corals from the " silex bed " of the Tampa formation. 



By Dr. T. Wayland Vaughan. 



AntilUaf willcoxi (Dana). 

 Stylophora silicensis Vaugliau.* 

 Oalaxea excelsa Vaugban. 

 OrMcella cellulosa (Duncan).* 



cavernosa var. tampacnsis Vaughan.* 

 cavernosa var. silicensis Vaughan.* 

 Cyphastrea tampae Vaughan.* 

 Maeandra tampacusis Vaugban. 

 Syzygo'phylUaf tampae Vaughan. 



Siderustrea silicensis Vaugban* (at Tampa brickyard). 

 Endopachys tampae Vaugban. 

 Aeropora tampaensis Vaugban. 

 Goniopora tampaensis Vaugban. 

 balUstensis Vaugban. 

 matsoni Vaughan. 

 Porites willcoxi Vaugban. 

 Alveopora tampae Vaugban. 

 The species marked * are widely distributed in the Chattahoochee forma- 

 tion of southern Georgia and northern Florida. 



Molluscan Fauna of the silex beds.^ 



MOLLUSCA. 



Land and Freshwater Species. 



Cepolis (Plagioptycha) latebrosa Dall. 

 Ccpolis (Plagioptyeha) instrumosa 



Dall. 

 Cepolis {Plagioptyeha) direpta Dall. 

 Pleurodonte haruspica Dall. 

 Pleurodonte crusta Dall. 

 Pleurodonte cunetator Dall. 

 Pleurodonte diespiter Dall. 

 Polygyra adaninis Dall. 

 Bulimulus (Hyperaulax) floridamis 



Conrad. 

 Bulimulus (Hyperaulax) heilprinianus 



Dall. 

 Bulimulus (Hyperaulax) amerieanus 



Heilprin. 

 Bulimulus (Hyperaulax) amerieanus 



var. partulinus Dall. 



Bulimulus (Hyperaulax) amerieanus 

 var. laxus Dall. 



* Bulimulus (Hyperaulax) tampae 

 Dall.' 



* Bulimulus (Hyperaulax) ballistae 



Dall. 

 Bulimulus (Hyperaulax) stearnsii 

 Dall. 



* Bulimulus (Hyperaulax) tortilla 



Dall. 



* Bulimulus (Hyperaulax) remolina 



Dall. 

 Cerion (Eostrophia) anodonta Dall. 

 Cerion (Eostrophia) anodonta var. 



floridanum Dall. 



* Microcerion floridanum Dall. 



* Pupoides pilsbryi Dall. 

 Urocoptis floridana Dall. 



* Planorbis tampaensis Dall. 



1 Those preceded by an asterisk (*) are new species. 



