MARYLAND GEOLOGICAL SURVEY ^U? 



Family PURPURID/E. 



Genus ECPHORA Conrad. 



Ecphora Conrad, 1843, Proc. Acad. Nat. Sci. Phila., vol. i, p. 310. 



? StenompJialus Saadberger, 1853. 



Ecphora Conrad, 1866, Amer. Jour. Conch., vol. ii, p. 75. 



Rapana Tryon, 1883, Manual of Conchology, vol. ii, p. 303. (In part.) 



Steno)nphalus Zittel, 1885, Handbuch der Paleontologie, Abth. 1'^, p. 370. (In part.) 



Rdpana Fischer, 1887, Manuel de Conchy liologie, p. 644. (In part.) 



Ecphora Dall, 1890, Trans. Wagner Free Inst. Sci., vol. iii, pt. i, p. 134. 



Rapana Cossmann, 1903, Essais de Paleoconch. Comp., vol. v, p. 63. 



Caret'u] study of large collections of material from the entire Atlantic 

 slope has shown that this genus, formerly considered as most constant 

 in its characteristics and most easy to recognize, should really be divided 

 into several distinct species, the generic position of some of which are not 

 at first sight apparent. 



The difficulty encountered in assigning these forms to a satisfactory 

 generic position can l)e seen from the great diversity of opinion already 

 recorded in the synonomy of the genus itself and in that of the several 

 species. This diversity of opinion becomes more evident when one notes 

 the different ];ositions assigned to the various genera in which the species 

 have been included. 



The recognition of tampaensis as a member of the genus makes it very 

 evident the genus itself belongs to the Purpuridce and is very closely re- 

 lated to Rapana, rather than to the Fusidce. 



The European species "Pyrula" jauberti Grateloup from the Tertiary 

 of Bordeaux, and " Troplion" cancellata Thomge from the Tertiary of 

 Mainz have been referred to this genus. 



Ecphora quadricostata (Say). 

 Plate LII, Figs, 1, 2, 3. 



Lister, 1685, Historia Conchyliorium, pi. 1059, fig. 3. 



Buccinum scala Dillwyn, 1833, Index of 3rd Edit, of Lister's Historia Conchyliorium. 

 Buccinum scala ? var. Say, 1834, Jour. Acad. Nat. Sci. Phila., vol. iv, 1st ser., p. 13S. 

 Fusus i-costatus Say, 1834, Jour. Acad. Nat. Sci. Phila., voL iv, 1st ser., p. 137, 



pi. vii, fig. 5. (Reprinted, 1896, Bull. Amer. Pal., No. 5, p. 33, pi. vii, fig. 5.) 

 Fusus quadricostatus Conrad, 1830, Jour. Acad. Nat. Sci. Phila., vol. vi, 1st ser., 



p. 311. 

 Fusus quadricostatus Conrad, 1843, Proc. Nat. Inst., Bull, ii, p. 187 (not p. 185). 

 Ecphora quadricostata Conrad, 1843, Proc. Acad. Nat. Sci. Phila., vol. i, p. 310. 



