IhiU (Old B</rf, •<'■/! — 77ir I\/niiiiiJelUdm. 9 



B- Varices pros(Mit 



Surface marked by axial ribs and stronj;- spiral 

 St rial ions 



Subg-. Mormula A. Adams, 18()-4. 



Type, Munnuld rixxoi/Hi A. Ads. 



Surface marked by axial ribs and strong spiral lira- 

 tions, sculpture grainilose 



Subg. Lancella nom. nov-. 



Tvpe. Tiirbonillii (Lanci'a) ehuKjitta 



Pse. 



A- Shell with basal keel 



Axial sculpture c(msisting of strong ribs 

 Spiral sculpture absent 



Asmunda subg. nov. 



Type. Chemnitzia tiirrita C. 1>. Ads. 



Spiral sculpture present 



Spiral sculpture consisting of strong ridges 

 Subg. Peristichia Dall. 1889. 



T>pe, Peristichia toretd Dall. 



Spiral sculpture consisting of two tumid ridges 

 one at the periphery the other at the summit 

 of the whorls and many fine striations in the 

 intercostal spaces 



B.ildra subg. nov. 



Type. Turbonilla [Buldra) arclitri 



sp. nov. 



Axial sculpture consisting of lines of growth only 

 Spiral sculpture consisting of faint lirations 

 Discobasis Cossmann, 1888. 

 Type, Acicvlina demissa Desh. 



SYNOPSIS OF THE SUBGENERA OF ODOSTOMIA. 



A' Postnuclear whorls sculptured similarly throughout 

 B^ Varices absent 



C^ Axial ribs present, rounded 



Spiral markings, when present, consisting of mere micro- 

 scopic striations 

 Shell inflated 



Summit of the whorls slightly shouldered 

 Subg. Elodiamea De Folin, 1884. 

 Type, Elodia deganx De Fol. 



