Phylum： Mollusca 軟體動物門
Class： Gastropods 腹足綱
Family： Camaenidae 南亞蝸牛科
Scientific name： Amphidromus
metabletus pachycheilus f. alba
Chinese name：
Author： von Möllendorff,
1901
Size： 42.4mm
Description： Specimen taken
from Nha Trang, Vietnam.
Subsp.
Pachychilus is stronger-shelled
throughout, thicker lipped, parietal callus stronger ; suture more distinctly
margined; base less wide than Amphidromus
metabletus.
The individual variations are
even more numerous than in the type, the following " forms " being distinguishable
:
A (flava), uniform yellow. (for nomenclatural
purposes equivalent to pachycheilus).
B (alba), uniform white.
C (tritaeniata), yellow with 3 brown bands,
the middle one sometimes lost.
D (trizona), white with 3 bands.
E (interrupta), like D, but the bands interrupted and
reduced to rows of spots.
F (confluens), like D, but the bands more or less
widened and confluent.
G (fusca), uniform brown by widening and union
of the bands, except for a white sutural line.
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