166 
Measurement.—Dried, 8x4 mm. 
Hab.—Dredged by Dr. Verco from 130 fathoms off Cape 
Jaffa. Several valves were dredged from 300 fathoms off the 
south-east coast of South Australia. 
Remarks.—In detail this shell strongly resembles Lepi- 
dopleurus inquinatus, but the whole shell is much more carin- 
ated and the lateral areas differ in the massing of the 
-pustulgs. 
> 
7. Ischnochiton bednalll, sp. nov. Pl. vl 8 GR 
General Appearance.—Elliptical, valves wide, rounded, 
slightly carinated, side slopes curved, cream colour uniform 
in valves and girdle. The posterior margins of the valves pro- 
ject considerably and give a verandah-like appearance. ‘The 
valves are exceedingly delicate. 
Anterior Valve.—Two or three ill-developed grooves or 
growth-lines parallel to the girdle crossed by about twenty 
microscopically pustulose lire converging towards the apex. 
About twenty slits with regularly scalloped pectination 
between. 
Median Valve.—Dorsal area uniform in width composed 
of five or six rows of pustules either worn or compressed. 
Pleural areas divided into five irregular diagonal rows of 
pustules by reticulated sulci, which gives the appearance of 
open network. Lateral areas distinctly raised and crossed 
transversely with four rows of pustulose lire converging 
towards the dorsal area. Four of these pustules project from 
the posterior margin. Interior pearly-white. Valves pro- 
ject considerably. Sutural laminz small and delicate. Sinus 
very wide. Diminutive slit rays under 4-in. lens. 
Posterior Valve.—Mucro ante-median almost covered by 
the seventh valve. Concave between the mucro and the 
girdles. The mucro is covered with pustules, and the rest 
of the valve has two or three concentric rings of pustulose 
lire parallel to the girdle. The pustules grow smaller towards 
the mucro. About twenty-six slit rays. 
Girdle.—Covered with microscopically striated scales. 
Hab.—Two specimens only from St. Francis Island, 
Nuyt Archipelago, Australian Bight. 
Measurement.—Dried specimen, 6x3 mm. 
Remarks.—I have named this chiton after Mr. Bednall, 
the doyen of Polyplacophora work in Australia. It is an 
exquisite chiton, and somewhat resembles Jschnochiton 
pilsbryt and Lepidopleurus inquinatus. 
