170 
Median Valve.—Dorsal area, triangular, smooth, spotted. 
Lateral areas distinctly raised with four or five irregular pus- 
tules. Median valves covered with microscopic granules. 
Posterior Valve is missing. 
Girdle.—Covered with imbricating striated scales. The 
outer edge of the girdle is fringed with delicate specules. 
Measurement.—4 x3 mm. 
Hab.—Henley Beach (Mr. Baker). 
Remarks.—Strongly resembles a juvenile Loricella 
angasi, but its striated girdle-scales distinguish it. I have 
much pleasure in naming it after its discoverer. 
EXPLANATION OF PLATES. 
a—Dorsal view of entire shell. 
b—Anterior valve. 
e—Median valve. 
d—Posterior valve. 
e—Lateral view of posterior valve. 
f—Portion or girdle magnified. 
The sizes of type specimens are marked in each case. 
Prate V. 
1a,b,c,d,e,f—Callochiton, mayi, Torr. 
2a,b,c,d,e,f—Lepidopleurus pe ehReta, sp. Noy. 
3a,b,c,d,e,f—Ischnochiton bednalli, sp. nov. 
Prate VI. 
4a,b,c,d,e,f—Acanthochiton rufus, sp, nov. 
5a,b,c,d,e,f—Acanthochiton kimberi, sp. nov. 
6a,b,¢,d,e,f—Ischnochiton levis, sp. nov. 
Prate VII. 
7a,b,¢,d,e,f—Acanthochites rubrostratus, sp. nov. 
8a,b,c,d,e,f—Acanthochites bakeri, sp. nov. 
