172 DR. J. C. COX ON NEW AUSTRALIAN SHELLS. [Mar. 24, 
gradually increasing in size, last depressed in front; aperture ro- 
tundately lunate; peristome white, expanded, margins slightly ap- 
proaching ; columellar margin ivory-white, triangularly expanded and 
fused into the body of the shell. 
Diameter—greatest 0°90, least 0°73 ; height 0°74 inch. 
Hab. Nichol Bay, Western Australia. 
7. BULIMUS SAN-CHRISTOVALENSIS. (Plate XVI. fig. 7.) 
Shell rimately perforate, conically ovate, club-shaped ; spire elon- 
gated and proportionally slender, moderately thin, rather finely 
transversely malleated, pale brown, apex pink, abundantly and irre- 
gularly ornamented with triangular or irregular longitudinal zigzag 
markings; whorls 5, the last inflated and forming three-fourths 
the length of the shell; aperture elliptically oval; peristome pink, 
shortly expanded and very slightly thickened; columellar margin 
dilated and divided into two pillars—one, the larger and more highly 
coloured, prominent, and running spirally within the body of the 
shell, the second running forward toward the insertion of the oppo- 
site end of the peristome and becoming blended with a callus of 
union; in some specimens a tooth exists between the spiral internal 
pillar of the columella and the insertion of the opposite end of the 
peristome. 
Diameter 1°20, length 1°60; aperture 1°45 long, 0°60 inch broad. 
Hab. San Christoval, Solomon Islands. 
8. Reciuzia HARGRAVESI*. (Plate XVI. fig. 8.) 
Shell imperforate, pyriform, thin, scalariform, greenish horn- 
colour, shining, transversely obsoletely striated, and very indistinctly 
banded; whorls 64-7, markedly rounded, and separated by a deep 
suture; aperture ovately rounded; peristome thin, simple; colu- 
mellar margin thickened and expanded. 
Hab. Miall River, Port Stephens, N.S.W. 
Diameter—greatest 0°90, least 0°67 ; length 1°53; aperture 0°65 
long, 0°50 inch wide. 
DESCRIPTION OF PLATE XVI. 
Fig. 1. Helix rainbirdi, p. 170. 
2. Helix thatcheri, p. 170. 
3, 3a. Helix nove-georgiensis, p. 170. 
4, 4a. Helix macgregori, p. 171. 
5. Helix chancet, p. 171. 
6. Helix convicta, p.171. 
7. Bulimus san-christovalensis, p. 172. 
8. Recluzia hargravesi, p. 172. 

* [Mr. H. Adams, who has been kind enough to look over this paper for Dr. 
Cox, remarks that this shell is pelagic, and was probably found at or near the 
mouth of the river, whither it had been driven by the winds from the sea.—Eb. | 
