388 Journal of the Asiatic Society of Bengal. [N.S., XIX, 
The large shell agrees very well with Mollendorfi’s figure, 
but is slightly smaller. The species was described from 
between Li-dshia- pu and Kuang-ting in Kangsu. 
Family TROCHOMORPHIDAE. 
Trochomorpha demolita Heude. 
1885. Helix demolita, Heude, op. a P ie a ¥. XIX, Figs. 7, 7a. 
1902. Plectotropis demol ita, Gude, 
Described from Tchenk’eou in aoa 
Var. tonkincrum Mabil 
1887. Trochomorpha a aa ae Soc. Malacol. France. 
V, p. 97, Plate III, Figs. 
1892. Trockomorpha sare oo Pusbry uy Tryon’s Man. Conch. (2), 
pir p. 120, Plate XIX, Figs. 17, 
One shell in perfect conditi ion. Cliff ie the Mekong at Awa bend. 
Altitude, "6 ,400 feet. 22. 
m convinced that this is merely a dwarf form ot 
Heude’s “ Helix demolita.” The outlines are identical and the 
eo applies equally well, apart from measurements, to 
th for 
The £ Gatkches outline of the shell, conoid spire, transverse 
mouth with its strong terminal projection and ingens _ 
lip, are, considered together, very characteristic. The mouth 
is much wider than that of ?. samara (Heude). | The measure: 
— of the specimen from Yunnan are 12°5 mm. x 1 m. 
x4 To judge from his figure, Mabille’s hansarenienk of the 
height of the shell, which appears to have been a little over 
4mm. high, was too small. 
The form was described from Tonkin. 
Family HELICIDAE. 
Plectotropis submissa (Desh.). 
1873. Helix submissa, Deshayes, ee Arch. Mus. Hist. Nat. (Paris), 
en gone ti , Plate II, Figs. 30- Se 
elix su peeie, Hee ide, op. oa 30, Plate a ba 2, 
1887. Helix (Trichia) — oe Man , Ait, p. 18% 
Plate XX XIX , Figs. 
1899. Reet submissa, Méllendorf, op. cit., p. 64. 
A lar mber of shells from a cliff above the Mekong at Awa 
ve ak: 6 =“ — and from the canyon of the Mekong Snore 
shone 13 mm. in maximum diameter. —— which are not — 
bleached are rather dark hair-brown, sometimes with a narrow 
white peripheral band. There is jolisidevabile variation in 
the flatness of the — surface of the shell. 


' Helix samara, Heude, op. cit., p. 142, Plate XXXVII, Fig. 3(1800)- 
