242 HELIX-CHLORITIS. 



Section II. PLANISPIRA Beck. 



Apical whorl smooth, not granulate or sculptured. Shell white 

 or pale, banded with brown. 



For the ill-defined subdivisions of these sections, see under the sec- 

 tional heads below. 



Section I. CHLORITIS Beck, 1837. 



Chloritis BECK, Index Moll. p. 29, (Subgenus 24th). ALBERS, 

 Die Heliceen 1850, p. 91 ; Die Hel. (Edit, v MARTENS) p. 161, 

 1860, type H. ungulina Linn* TAPPARONE CANEFRI, Annali Mus. 

 Civ. Genova, xix, p. 161, 1883, and of authors generally, Erigone 

 ALBERS, Die Hel., 1850, p. 92 (for H. discordialis Fer.). Semicornu 

 (" Klein") H. & A. Adams, Genera Rec. Moll, ii, p, 202, 1855. 



As I have already said above, the species of Chloritis have the 

 apical whorl granulate; this character is sometimes obscured by 

 the apex becoming rubbed or worn. Under Chloritis four feebly- 

 characterized subsections we may recognize with profit, splitting, as 

 they do, the multitude of species into manageable portions. 



1. Subsection Chloritis (restricted). Spire plane or sunken, 

 rarely elevated. Shell generally unicolored reddish, sometimes 

 banded, under a thin, freely deciduous epidermis which is usually 

 velvety or hairy. Last whorl embracing the preceding one. 

 Umbilicus open. Moluccas, New Guinea, Louisiade, Solomon and 

 Admiralty groups of islands. Type H. ungulina Linn. 



2. Subsection Sulcobasis Tapp. Can. Shell large, heavy, globose- 

 depressed, the spire convex ; dark, unicolored ; base encircled by 

 more or less well-marked sulci or furrows. Type If. sulcosa Pfr. 



3. Subsection Austrochloritis Pilsbry. Small, thin, unicolored, 

 narrowly umbilicated ; spire convex ; aperture lunate ; epidermis 

 hairy or velvety, not deciduous. Peristome thin, narrowly reflexed. 

 Northern Australia, Western New Guinea. Type, If. porteri Cox. 



4. Subsection Trichoehloritis Pilsbry. Shell depressed, thin, 

 light, the spire low-convex or plane ; epidermis not deciduous, more 

 or less hairy or velvety ; unicolored brown or having a supraperiph- 

 eral band. South-eastern Asia ; Philippine Is. Type, H. breviseta 

 Pfr. 



