GRYPH^A. 155 



the umbones ; muscular impressions two ; palleal impression 

 having a slight sinus. — Obs. Only one species is known, G. 

 cuneatus, fig. 83, from New Orleans. It is known from all 

 other shells by the character of the hinge. 



GONIATITES. De Haan. A genus composed of species of 

 Ammonites, Auct. in which the last whorl covers the spire and 

 the sinuations of the septa are angulated. Fig. 480, G. striatus. 



GONIDOMUS. Sw. A sub-genus of Geotrochus, Sw. Pupa 

 pagodus, Auct. Sw. p. 332. 



GONIOSTOMA. Sw. A sub-genus of Bulimus, thus described, 

 "spire elongated, of few whorls ; aperture contracted at each 

 end ; lips margined ; the pillar curving inwards ; the base 

 slightly notched. G. erubescens, Sw. Zool. Journ. i. pi. 5, f. 2." 

 Sw. p. 335. 



GONIOSTOMATiE. Bl. A family belonging to the order Asi- 

 phonibranchiata, Bl. containing the genera Solarium and 

 Trochus. 



GONOSPIRA. Sw. A sub-genus of Pupa, thus described, " spire 

 perfectly cylindrical, of equal thickness, the tip obtuse, with the 

 whorls large ; aperture oval ; lips thickened ; pillar with or 

 without a plait. G. polanga, Desk. Lesson, Voy. pi. 8, f. 8." 

 Sw. p. 333. 



GRANULATED. (Granum, a grain.) Covered with minute grains, 

 rough. The granulated lip of Oniscia, (fig. 409) will serve as 

 an example. 



GRATELOUPIA. Moulins. Fam. Nymphacea, Lam.— Descr. 

 E qui valve, inequilateral, sub-cuneiform, rounded anteriorly, sub- 

 rostrated posteriorly ; hinge with three cardinal teeth, a series 

 of five or six irregular, small, diverging teeth behind the um- 

 bones, and one lateral anterior tooth in each valve ; ligament 

 external ; muscular impressions two ; palleal impression sinuated 

 posteriorly. — Obs. This genus (Donax irregularis, Bast.) is only 

 known in a fossil state. Fig. 102, G. Moulinsii. 



GRYPHiEA. Lam. (From Gryps, a griffin.) Fam. Ostracea, 

 Lam. — Descr. Inequivalve, free ; lower valve large, concave ; 



