CLASS GASTEEOPODA. 



Cyrtolites, 



FAMILY BELLEROPHONTID^.— Bellerophon, Bucania, Oarinaropsis, 



Ecculiomphalus, Microceras, Phragmostoma, Porcellia, Tremanotus. 



FAMILY CALYPTR^IDiE.—Capulus,Conchopeltis,Metoptoma,PalEeacm£ea,Platyceras, 

 Trochita. 



FAMILY CHITONIDJi;.— Chiton. 



FAMILY DENTALIID^.— Dentalium. 



FAMILY HELICIDiE.— Dawsonella, Pupa, Streptaxis, Zonites. 



FAMILY LITTORINIDiE.— Xenophora. 



FAMILY MACLURtEID^.— Maclurea. 



FAMILY MURICID/E.— Fusispira. 



FAMILY NATICID.E.— Naticopsis, Trachydomia. 



FAMILY PLEUROTOMARIID^.— Heliootoma, Microdoma, 



maria, Raphistoma, Scalites. 

 FAMILY PYRAMIDELLID.E.— Aclis, Chemiiitzia, Loxonema, Macrocheilus, Polyphe- 



mopsis, Soleniscus, Subulites. 

 FAMILY ROTELLIDiE. -Anomphalus. 

 FAMILY SCALARIIDiE.— Holopella. 

 FAMILY SOLaRID^.— Euomphalus, Ophileta, Phanerotinus, Platyschisma, Platyos- 



toma, StraparoUus, Straparollina, Strophostylus. 

 FAMILY TURBINIDiE. — Clisospira, Cyclonema, Cyclora, Eunema, Holopea, Isonema, 



Orthonema, Orthostoma, Trochonema, Turbo. 

 FAMILY TURRITELLID^.— Turi-itella. 



Murchisonia, Pleuroto- 



AcLis, Loven. [Ety. a, without ; Jcleis, a 



projection.] 

 minuta, Stevens, 1858, Am. Jour. Sci., 



vol. 2.5, Coal Meas. [Sig. minute.] 

 robusta, Stevens, 1858, Am. Jour. Sci., 



vol. 25, Coal Meas. [Sig. robust.] 

 swallovana, Geinitz, 18(J6, (Turbonella 



swallovana) Carb. und Dyas in Neb., 



Coal Meas. [Ety. proper name.] 

 Acroculia, Phillips, 1841, syn. for Platyceras. 

 angulata, see Platyceras angulata. 

 erecta, see Platyceras erecta. 

 ovalis, see Platj'ceras ovalis. 

 niagarensis, see Platyceras niagarensis. 

 trigonalis, see Platyceras trigonalis. 

 Ampullaria, Lamarck, 1801, Syst. An. sans 



Vert. [Ety. ampuHa, a flask.] 



helicoides, see Platyschisma helicoides. 



Anomphalus, Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci. [Ety. Anonqjhalos, 



without an umbilicus.] 

 meeki, see Dawsonella meeki. 

 rotulus. Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci. Phil., Coal Meas. [Sig. 



a litttle wheel.] ' 



Bellerophon, Montfort, 1808, Conch. Syst., 



vol. 1. [Etv. mythological name.] 

 acutilira, Hall^ 18 62, 15th Reg. Rep., 



Ham. Gr. [Sig. sharp-ridged.] 

 acutus, Sowerby, 1839, Murch. Sil. Syst., 



Low. Silurian. [Sig. sharp.] 

 allegoricus, White, 18 74, Rep. Invert. 



Foss., Quebec Gr. [Sig. allegorical.] 

 amjmtata, see Bucania angustata. 

 apertus, Sowerby, 1825, Min. Conch., vol. 



5, Low. Carb. [Sig. an opening.] 

 argo, Billings, 1860, Can. Nat. & GeoL, 



vol. 5, Black Riv. & Trenton Gr. 



[Ety. mythological name.] 

 auriculatus, Plall, 1852, Pal. N. Y., vol. 2, 



Coralline limestone. [Sig. having ear- 

 like appendages.] 

 barquensis, Winchell, 1862, Proc. Acad. 



Nat. Sci., Marshall Gr. [Ety. proper 



name.] 

 hidorsaim, see Bucania bidorsata. 

 bilobatus, Sowerby, 1839, Murch. Sil. 



Syst., Black Eiv. to Mid. Sil. [Sig. 



two-lobed.] 



