169 
Hab.—Hdithburgh (Mr. Matthews). 
Remarks.—This belongs to the smooth variety of 
Ischnochitonide. It resembles 7. wilsoni, but its surface is 
not so granular. My one specimen is damaged. The name 
levis is given on account of its smoothness. 
61. MEET EE rsh. Sp). NOU. 
Pl. vii, figs. 7a-f. 
General Appearance. —Shell elliptical, broad, girdle 
wider than the valve. Tegmentum cream-coloured, dorsal 
areas bright-green tipped with rosy-pink, which gives it its 
name. 
Anterior Valve.—Three to five distinct pustulose riblets 
with probably five slits. My dissected specimen was dam- 
aged. In one co-type the pustulated riblet becomes one 
elongated pustule. The tegmentum is covered with flattened 
pustules. 
Median Valve.—The lateral area is separated from the 
pleural area by a rib covered with pustules. The lateral and 
pleural areas are covered with nine rows of rounded appressed 
pustules, somewhat regular, converging towards the apex. 
The dorsal area is narrow, corneous, showing growth-lines, 
no strie, somewhat foliated, one slit. 
Posterior Valve.—Mucro posterior with rows of pustules 
between it and the girdle, to which it is at right angles. 
A dorsal area is seen which is almost smooth with irregular 
pustules on the sides. The interior is pearly, deeply hol- 
lowed, five slits, insertion plates large. 
Girdle.—Leathery covered with minute spinelets, having 
long silky tufts at the sutures and five tufts around the 
anterior valve. In a spirit specimen the girdle is as wide 
-as the valves. 
Measurement.—Dried specimen, 11 x 6 mm. 
Hab.—Two specimens from St. Francis Island and one 
collected by Mr. Baker at Henley Beach. 
Remarks.—Somewhat resembles A. speciosus, but the 
girdle is very much smaller and is not continued between 
the valves. The Acantho tufts are also much more decided 
than in speciosus. 
Contatllics 
62. Ischnochiton bakeri, sp. nov. PI. vii., figs. 8a, b, ¢, f. 
General A ppearance.—Shell almost round, valves narrow, 
flattened, colour greyish-white mottled with brown. 
Anterior Valve.—Covered with microscopic imbricating 
pustules, closely packed, resembling girdle scales. 

fA FA 
