FASCICULI MALATENSES 
207 
exhibit the beak-like distal end, common to so many species. The form of 
the species reminds one of this same organ in some species of Girasia^ Gray. 
The vestibule is wide, and leading into it in the middle portion is the vagina, 
a long, wide, spacious tube, which distally receives the short duct of the 
receptaculum seminis. The free oviduct is very short and scarcely differentiated 
from the common duct, which is thrown into a single fold and richly convoluted. 
The penis commences as a wide muscular tube, and at the point where the 
retractor muscle is inserted becomes bulbous, and makes a sharp turn upon 
itself, then gradually tapering passes into the vas deferens which joins the 
common duct on the opposite side to and just above the opening of the 
receptacular duct. Internally the lumen of the penis does not agree with the 
external form, agreeing in this character with the genus Microparmarion^ Simr. 
At the proximal end the penis is a fine canal which makes a bend to the right 
side and then to the left side, it is then continued as a fine tube to the region 
where the penis is folded upon itself ; here it expands into a sac-like chamber 
which is connected by a tube-like portion with a further dilation, which latter 
gradually lessens in size, continuing on the ventral side of the organ, and 
ultimately passes into the vas deferens (PI. XII, Fig. 12). 
HELICARION, F6r. 
3. Helicarion permolle, Stol. 
Helicarion permolle, Stol. J. J. S. B. xlii, p. 18, pi. i, fig. 1 1 ; pi. ii, figs. 21-23 
(1873)- 
Telom, Perak-Pahang boundary. 4,000 feet. 
ARIOPHANTA, Desmoulins 
4. Ariophanta janus (Chem.) 
Helix janus. Martini and Chemnitz., Conch. Cah. xi, p. 307, figs. 3016, 3017. 
Bukit Besar, Nawngchik. 2,500 feet. 
NILGIRIA, Godw-Aust. 
5, Nilg^iria lowi (De Morgan) 
(Plate XII, Figs. 14-16) 
Helicarion lowi, De Morgan^ Bull. Soc. Zool. Fr. x, p. 25, pi. i, figs. 3a-3d 
(1885). 
From a single alcoholic specimen collected at Bukit Besar (3,000 feet), I 
am able to give the following particulars. The animal is a deep chrome yellow, 
