GLAUCONOME. 153 



whorls. Helix bicarinata, Sow. Zool. Journ. 1, pi. 3, fig. 7. 

 Sw. page 166 and 332. 



GEOPHONUS. Montf. Conch. Syst. t. 1, p. 19. A genus of 

 microscopic Foraminifera. 



GEOTROCHUS. Sw. Helix pileus, Auct. (fig. 278,) and other 

 trochiform species. Divided into the sub-genera Pithohelix, 

 Geotrochus, Hemitrochus, Gonidormus, and Geomitra. Sw. p. 

 165 and 166, described at page 331. 



GEOVULA. Sw. A sub-genus of Melampus (Auricula), con- 

 sisting of oval species, resembling Auricula Midse, fig. 297. 



GERVILLIA. Defr. Fam. Margaritacea, Bl. Malleacea, Lam. 

 —Descr. Equivalve, oblong, oblique ; hinge long, straight, 

 having small, irregular, transverse ligamentary pits. — Obs. This 

 genus of fossil shells, found at various geological periods, from 

 the Lias to the Baculite limestone in Normandy, is now extinct. 

 In general form it resembles Avicula, but in the hinge it ap- 

 proaches Perna. Fig. 169, G. Avicularis. 



GIBERULA. Sw. A genus separated from Marginella, Auct. 

 and thus described, " sub-oval ; spire slightly prominent ; top 

 of the outer lip dilated and gibbous ; base of the inner lip 

 with plaits ; inner lip broad, spreading. G. Zonata. Enc. Meth. 

 374, f. 6." 



GIBBOSE or GIBBOUS. (Gibbosus.) Bunched out, embossed, 

 having a lump or swelling of any kind. Ex. Bulinus Lyone- 

 tianus, (fig. 284.) named Gibbus by De Montfort. Ovulum 

 gibbosum. 



GIBBUS. Montf. Bulinus Lyonetianus, Lam. Pupa, Bl. fig. 

 284. 



GIOENIA. A name given in the Encyclopedic Methodique, to the 

 plates of the stomach of Bulla Lignaria. 



GLABELLA. Sw. Marginella Glabella (fig. 437), Goodallii, 

 Auct. and similar species. 



GLANDINA. Schum. Polyphemus, Montf. 



GLANDIOLUS. Montf. A genus of microscopic Foraminifera. 



GLAUCONOME. Gray. Fam. Solenacea, Lam.— .Descr. Oblong 



