SCULPTARIA, AMPHIDOXA. 39 



P. hottentota Melv. & Pons. P. turmalis Morel, viii, 144. 



[viii, 141. P. viridescens Melv. & Pons. 



P. inops Morel, viii, 144. [viii, 78. 



P. liricostata Melv. & Pons. P. vorticialis Bens, iii, 107. 



[viii, 140. P. vorticella H. Ad. iii, 35. 



P. loveni Kr. iii, 106. P. zanguebarica Craven. 

 P. lygsea Melv. & Pons. viii, 



[138. 



Subgenus ? SCULPTARIA Pfr., 1856. 



Seulptaria PFR., Malak. Blatter ii, p. 135, type H. sculpturata 

 Gray. 



Shell small, discoidal, carinated, widely umbilicated ; last whorl 

 becoming free at the aperture ; aperture very oblique, rounded, 

 with continuous slightly expanded peristome, and having several 

 teeth on the outer lip and an entering parietal lamina. Type H. 

 sculpturata Gray, pi. 10, fig. 4. 



Anatomy unknown. A group of problematic relationships, rep- 

 resented by a few species in southwestern Africa (Damaraland). 

 S. damarensis H. Ad. iii, 138. S. chapmanni Anc. viii, 152. 

 S. sculpturata Gray, iii, 138. S. retisculpta Mts. viii, 152. 

 v. collaris Pfr. iii, 138. 



Genus AMPHIDOXA Albers, 1850. 



Amphidoxa ALB., Die Hel. p. 110 (for H. marmorella and heli- 

 cophantoides) ; Edit. Martens, p. 82. 



Shell thin, depressed-globose or discoidal, perforated or umbili- 

 cated ; aperture lunar-rounded or ovate ; peristome simple, thin. 

 Type H. marmorella Pfr., pi. 7, figs. 10, 11, 12. 



Distribution : southwestern shore of South America and adjacent 

 islands, Juan Fernandez, Chiloe, etc., Cape Horn region and Ker- 

 guelen Is. 



These shells resemble some forms of the genera Flammulina and 

 Endodonta-, the typical Amphidoxas recalling Flammulina or 

 Calymna, the Stephanodas being like Allodiscus, Suteria or Charopa. 

 The anatomy of the South American forms is unknown, but that of 

 A. hookeri of Kerguelen Island shows an affinity to Charopa in the 

 possession of parapodial grooves. Two sections compose this group. 



