;o/i_ 



posteriorly and with less conspicuous sculpture. S, f^aVoi re- 

 seinliles more closely the Duplin ]^, lata Dall (l) and the recent 

 3. concent rica- G^ul a (2), of V7hlch are slip-htly more ineo'ii- 



(1). Idem, p. 914, pi. 5^, fig. 20. 



(2). Proc. Boston ^oc . i'at. ''-^ist., vol. 8, p. 280, 1862; Dall, 

 and SiraiDSon, "Bull. IJ. S. 'B'ish ■-^omm. , vol. 20, vt . 1, "o. 

 174, pi. 58, fig. 12. 



lateral and more comnressed. Ihe Pliocene S. -polita Dall {^) 

 is slightly larper, more ixiequilateral, more compressed, v.lth 



(5). loe. Git., p. 915, t^I. 55, fig. 17, IS-TG. 



feeble sculpture. 



■The name is ffiven in memory of ".'illiain 'Tore Oahb, whose 

 Santo Jomingia.- memoir is a classic in :;he -eolop'ical litera- 

 ture of the 'Test Indies. 



Occurrence .- lov/er "'iocene : Bo -den be s, Bowden, Janaios. 



