612 APPENDIX. 



Vol. i. p. 57, Genus TIEDEMANNIA. 



This genus was first made known by Forskal, in 1775, under 

 the name of Gleba, which name should be used. 



Genus GLEBA, Forskal. 

 Syn. Argivora, Lesueur. Tiedemannia, Van Beneden. 



Specks of Glcba. 

 Charybdis, Trosch. punctata, Quoy and Gaim. 



chrysosticta, Erohn. radiata, Quoy and Gaim. 



cordata, Forsk. Scylla, Trosch. 



Vol. i. p. 59. Genus SPIRIALTS. 



In this genus wo included the Heliconoides inflata of 

 D'Orbigny, in which the front of the aperture of the shell is 

 prolonged into a spine-like curved beak. This peculiarity, how- 

 ever, appears sufficient to entitle it to be considered the type 

 of a distinct genus. 



Genus HELICONOIDES, D'Orbigny. 



Operculum glassy, very thin, few-whorled. 



Shell thin, transparent, discoidal, sinistral, axis umbilicated ; 

 whorls smooth ; peristome disunited, notched on each side, and 

 with an elongated arched beak in front. 



Ex. H. inflata, D'Orbigny, pi. 137, fig. 2. Operculum, H. 

 inflata, fig. 2, a. Shell, H. inflata, fig. 2, b. 



Species of Heliconoides. 

 inflata, D'Orb. scaphoidea, Gould. 



Vol. i. p. 51). Genus IIETEROFUSUS. 

 In this genus the species clathratus, of which we have figured 



