GODWIN-AUSTEN : ON HELIX BASILEUS, BENS. 249 
plain border to the peristome; there are no shell-lobes. The right 
dorsal lobe is fairly large, the left formed into two distinct lappets, 
only separated by a narrow slit. The anterior part is a large solid 
fleshy mass of a dark reddish-brown colour upon a paler flattened 
base ; the posterior is of the same character, but paler in colour. The 
visceral sac is darkly coloured near the mantle-margin, beginning with 
a narrow, dark grey, band adjacent to the edge. It is then closely 
mottled with black for 13mm. backwards, gradually shading off. 
On the side of the rectum and following the suture is a band with 
a white ground very finely speckled with black. The renal organ 
is conspicuous, 17 mm. long by 3°5 mm. wide, of an ochre-brown tint, 
with a very blackly mottled margin of the same breadth on the inner 
or sutural side of the visceral whorl. The integument covering the 
heart was too opaque to show that organ, owing perhaps to the 
action of the alcohol. 
Generatwe Organs.—The retractor muscle of the penis is attached to 
the end of a cecum given off at the main bend. There isno flagellum : 
the vas deferens joins the point of a rounded knob-like process. The 
amatorial organ is large, bent on itself, tapering towards the retractor 
muscle end. The spermatheca is small, an ovate-shaped bag on a short 
stalk. In this specimen it was pointed in form (Pl. VI, Fig. 3, sp.), 
owing to the presence of a spermatophore. On cutting open the 
envelope this was found to consist of a long cylindrical capsule (Fig. 3a), 
rather solid, and 29mm. in length. No spined portion was seen, for 
most unfortunately it fell from the glass slip on to the ground, and 
a certain portion was broken off. There was sufficient to show that 
the organ in this genus differs very much in its conformation from 
the type of spermatophore found in Macrochlamys, Bensonia, and Girasia. 
The genitalia, compared with other species known to me, come 
nearest to that of Nilgiria solata.' 
The salivary gland is large and wide, in one mass, spreading in 
a thin layer over the capacious stomach. Only one duct was observed 
(the other may have been broken), this, close to the more solid anterior 
part, divided into two. 
The radula (Fig. 5) is very broad, 5°5 mm., its length being 11 mm. 
The rhachidian tooth is tricuspid, the admedian teeth are elongate 
with a cusp on the outer side, the laterals are aculeate, slightly curved 
in form, they become shorter and more slender, and the outermost are 
blunt and minute, thus resembling those of Ravana politissima (Pfr.), 
but the formula is different, viz. :—56 :2:28:1:28:2:56. This 
formula corresponds within 2 of Mlgiria Chenui, but in that species 
the admedian teeth are tricuspid. 
The jaw (Fig. 4) is solid, with a central projection on a concave 
cutting edge. 
Benson, judging from shell characters alone, was quite right in 
saying, ‘‘ Helix Basileus is related to the Cingalese group containing 
1 Jn Ariophonta Dalyi it may be noticed what a very small and rudimentary 
flagellum is present near the junction of the vas deferens with the penis. 
