1046 MALAYSIAN LAND AND FRESHWATER MOLLUSCA, 
Section Amphidromus. 
Bulimus loricatus, Pfr. Proc. Zool. Soc. 1854, p. 293; 
{Amp>hidromus) Pfr. Vers. p. 147 ; Mon. Hel. IV. p. 372. 
Java. 
B. PERVERSUS, L.= Helix perversa, L. Syst. Nat. 12th edit. 
.Species, No. 136. Sub-umbilicate, ovate, oblong, often sinistral, 
colour various, but generally uniformly light green, lemon yellow, 
or white ; or marked variously with spots or bands, such as a deep 
brown oblique streak, white with red spot, red lip, white lip, 
variously spotted with a bluish throat. This well-known and 
widely-spread shell which . is found all through the Archipelago 
( Borneo 1), Malay Peninsula, Moluccas and Burmah, was known 
to the early conchologists, twelve authorities being quoted by 
Linnfeus for this species and B. dextra, which is evidently a variety. 
It is unnecessary to reproduce the authorities which occupy nearly 
two pages of Pfeiffer’s Mon. Hel. (Vol. III. p. 308). It is very 
common about Malacca, and on wet days especially may be 
gathered off the leaves of the trees where it is with difficulty 
distinguished on account of the similarity of its colour. Without 
quoting authorities, it may be mentioned that it has been known 
by the following names ; — Bulimus, Helix, Limax, Orthostylus, 
perversa, dextra, sinistra, atricallosa, interrupta, aurea, citrina, 
sultana, javanica, niacassariensis. 
B. LEUCOXARTiius, voii Mart. = B. leucoxanthus, von Mart. 
Monatsber. Berk Ak. 18th July, 1864, p. 526 (Reeve, Bui. f. 187 
b: dextra.); Ostas. Zool. II. p. 348, pi. 20, figs. 11-12 (sinistr.) ; 
Pfr. Mon. Hel. VI. p. 18, 
Java. 
epidermis differ from the other jjarts of the upper layer only in having been 
deprived of, or in never having possessed, the element which gives trans- 
parency to the membrane ; in the same manner as hydrophanous opal has 
become white, from the expulsion of its water of crystallization.” Reeve, 
Conch. Icon. Bulimus. 
