— 6 — 
Genre Trochomorpha Albers. 
SECTIONS 
(1) Nigritella Alb. (4) 
(2) Thysanota Alb. (5) 
(3) Sitala H. Ad. 
Syn. Conulema Stoliez. 
(5) Trochomorpha Troilus Gould. Ile Samoa (Mousson). 
[Syn. Hélix Troilus Gld. ] 
Kaliella W. Blfd. 
Videna H. et A. Ad. 
Syn. Dis eus Alb. 
FAMILLE DES HELICIDÆ 
Genre Hélix Linné. 
SECTIONS 
(1) Glyptostoma Blnd. 
(2) Amphidoxa Alb. 
(3) Microphysa Alb. 
(4) Pelia Alb. 
(5) Gysticopsis Môrch. 
(6) Pella Alb. 
(7) Strobila Morse. 
(8) Gonostoma Hld. 
Syn. Tridopsis Bfq. 
— Anchistoma Kob. 
8 a Drepanostoma Porr. 
8 b Trigonostoma Ftzgr. 
Syn. Helicodonta Riss. 
— Vortex Bk. 
— Euphemia Leach. 
8 e Garacolina Ehbg. 
8 d Sculptaria Pfr. 
(9) Aegista Alb. 
(10) Ophiogyra Alb. 
10 a Corilla H. et A. Ad. 
Syn. Polygyra Sw. 
— Atopa. Alb. 
10 b Polygyratia Gray. 
Syn. Polygyra Woodw. 
10 e Systrophia Pfr. 
10d Stegodera Mrts. 
(11) Plectopylis Bens. 
(12) Polygyra Say. 
Syn. Ulostoma Alb. 
— Anchistoma H. et 
A. Ad. 
12 a Polygra Môrch. 
12 b Daedalochila Bk. 
Syn. Stenotrema Hrtm. 
12 e Polygyrella Blnd. 
12 d Ammonitella Goop. 
(13) Stenotrema Rfq. 
Syn. Stenostoma Rfq. 
— Tridopsis Woodw. 
(14) Triodopsis Rfq. 
Syn. Tridopsis Bk. 
— Xolotrema Rfq. 
— Metodontia Mlldf. 
14 a Isognomostoma Ftzgr. 
14 b Triodopsis Tryon. 
(15) Mesodon Rfq. 
Syn. Aplodon Rfq. 
— Pater a Alb. 
— Ulostoma Tryun. 
