BLANFORD : LAND AND FRESH-WATER MOLLUSCA FROM SIAM. 279 
varying in length from 25°5 to 31 mm., and form a complete 
passage into A. moniliferus (Gould), (Proc. Boston Soc. Nat. Hist., 
vol. ii, 1846, p. 99), with which 4. Theobaldianus (Bens.), (Ann. & Mag. 
Nat. Hist., ser. 1, 1857, p. 329), appears to be identical (see Hanley, 
Conch. Ind., p. xi, note). Should this be confirmed it is probable 
that Gould’s name will have to be adopted for this rather handsome 
Amphidromus. 
138. AmpHipromus Xtencensis, Morlet. Journ. de Conch., 1891, 
pp. 27, 240, pl. v, figs. 4, 4a. Pitsunaloke ; Lampun. 
The figure quoted is that of a larger shell with the spire more 
elongate than in the specimens sent by Mr. Daly. There is, however, 
considerable variation in this respect, and Ancey (Bull. Mus. Marseilles, 
vol. i, p. 134) has noticed the variability of this species. A specimen 
sent from Pitsunaloke is 82mm. long by 17 mm. wide, whilst one from 
Lampun measures 23:5 by 13 mm., and another 26 by 15 mm. 
Morlet, in describing this species, points out that it is allied to 
A. filozonatus, Mous., from Java. 
a The name Xvengensis is derived from the chief town of the Laos 
tates. 
14. Ampnipromus XreNncENsis, var. Tryont, Pfr. Pilsbry: Man. 
Conch., ser. 1, vol. xii, p. 196. 
This, at first sight, appears quite distinct from A. Xiengensis, but 
the two pass into each other. A. Xiengensis is often a white, almost 
porcelanic shell, with vertical purplish brown bands, more or less 
interrupted, on all the whorls, and with two broad dark stripes 
separated by a broad white stripe round the base. The var. Zryont is 
pale to rich yellow, with only two well-defined dark stripes round the 
basal portion of the last whorl, much as in the common Burmese 
A. Sinensis (Bens.), which differs by being a less slender form. 
Specimens vary in length from 27 to 33mm. I am indebted to 
Mr. Preston for calling my attention to Pilsbry’s description of this 
variety. 
[ ‘These very handsome shells are common in both North and South 
Siam. The Karens use the shells as ornaments for small children. 
There are about five different species.” —W. M. D.] (This note refers 
to all the species of Amphidromus. The use of shells of Amphidromus 
as ornaments by the Karens has been noticed before, I think, by 
Mason, and certainly by Theobald.) 
Family PUPIDA‘(?). 
15. Crrastus Sramensts (Redf.). Pitsunaloke. 
T am doubtful about the generic relations of this species, and 
by no means satisfied that it is an ally of C. distans (Pir.) and 
C. Abyssinicus (Riipp.). 
[‘* Very common in long elephant grass. Not met with in the Laos 
States. I have not taken a single specimen near Lampun.” — 
W. M. D.] 
