FASCICULI MALATENSES 
2 
The Generative Organs (PI. XII, fig. 17). 
The vestibule is small and leads into a long wide vagina, distally, and on 
the right side the long receptaculum seminis opens into it ; this organ is a 
thick muscular tube for the first two-thirds of its length, then follows a much 
thinner portion which terminates in a thin-walled sac, this latter is attached to 
the side of the common duct by a short muscle. The free-oviduct is very 
short and exhibits two well-marked constrictions, which divide it up into three 
bulbous portions. The common duct is richly folded on the oviducal side 
and of considerable width. The vas deferens is very long, and enters the penis 
on the right side of the latter organ, whose commencement is evident by the 
muscular sac-like head, from the end of which a small flagellum arises ; the 
penis continues as a thin muscular tube for some distance, widening at the point 
where the retractor muscle is inserted, just beyond this there is a small caecal 
tube ; the muscular wall is thickest about this region, beyond the penis gradually 
tapers to a very narrow tube. Internally its walls exhibit a series of well- 
marked plications and rugosities. 
Compared with Trachia penangensis^ Stol., the generative organs agree 
with those of that species in the general form of the male organ, excepting in 
the origin of the vas deferens, in the presence in both species of a caecal-like 
diverticulum of the penis, and a small flagellum at the distal end of that organ, 
and in the elongate receptaculum seminis and vagina. 
15. Chloritis hardouini (De Morgan) 
Helix hardouini, De Morgan^ Le Naturaliste^ 1885, p. 68. 
Philidora hardouini, De Morgan^ Bull. Soc. Zool. Fr. x, p. 37, pi. i, figs. loa-iod 
(1885). 
Chloritis hardouini, Mlldff. P.Z.S. 1891, p. 335. 
Bukit Jalor, Jalor. 300 feet. 
AMPHIDROMUS, Albers. 
16. Amphidromus perakensis, Fult. 
var. g^lobosus, Fult., var. nov. 
Biserat, Jalor. 
‘ Common on tree trunks and on the leaves of wild bananas and ginger- 
worts. Known to the Malays as the “ moon-snail ” (siput bulan).' 
I am indebted to Mr. Hugh Fulton, who has made a special study of 
this genus, for very kindly examining and identifying these shells. He writes 
