226 stknopidje. 



ivoodii are inhabitants of New Zealand, and P. atramen- 

 taria is from New Holland ; the species of the sub-genus 

 Ampltidoxa, the shells of which are usually variegated and 

 thin, are principally from New Zealand, though a few are 

 from Chili and the Island of Juan Fernandez. 



Species of Paryphanta. 



atramentaria, Shuttl. Caffra, Ferns. 



Busbyi, Gray. Greenwooclii, Gray. 



Sub-gen. amphidoxa, Albers. 



Shell perforate, depressed, tbin, pellucid, whorls rather con- 

 vex, rapidly increasing ; aperture very oblique, ample ; peristome 

 simple, acute, the margins united by a thin callus. 



Chiron, Gray. helicophantoides, Pfeiff. 



Coresia, Gray. marmorella, Pfeiff. 



crebriflammis, Pfeiff. pblogopbora, Pfeiff. 



epsilon, Pfeiff. rapida, Pfeiff. 



glabriuscula, Pfeiff- splendidula, Pfeiff. 

 Jeffreysiana, Pfeiff. 



Genus HELICARION, Ferussac. 



Mantle with two free lobes in front upon the neck, and a 

 large lobe on the right side, covering the hind part of the 

 shell. Foot truncate posteriorly. 



Shell rotundately oval, heliciforrn, thin, fragile, covered 

 with a thin epidermis ; spire short ; aperture large ; peritreme 

 simple, acute, straight. 



Ew. H. viridis, Quoy and Gaimard, pi. 80, fig. 2. 

 Shell, H. Cuvieri, Ferussac, fig. 2, a. 



The species of this genus have an extensive fold of the 

 mantle developed on the right side, their foot is truncate, 



