ANOMIAD^. 
13 
fff Australian. 
9. Placunanomia zealandica. 
Suborbicular, white, smooth ; upper valve with distant, radiating 
grooves ; internally dark green. 
Upper valve with two confluent scars ; upper ohlong, longitudi- 
nal, lower rather small and more transverse. 
Anomia Zealandica, Gray, in Dieffenhach’s New Zealand, ii. 261, 
1843. 
Placunanomia Zealandica, Gray, P. Z. S. 1849, 123. 
a. Adult specimen. New Zealand : on the inside of mussel 
shells. Presented hy Dr. Stanger. 
10. Placunanomia ione. 
Shell white, laminar ; edge of the laminae with small, slender, 
elongated processes ; internally green. 
Lower muscular scars small, round, on the lower hinder edge of 
the larger one ; sinus or perforations large. 
Placunanomia ione. Gray, P. Z. S. 1849, 123. 
a. A single dorsal valve. On rocks, Australian Seas. Van 
Diemen’s Land. Presented hy Dr. A. Sinclair. 
11. Placunanomia COLON. 
Shell (upper valve) flat, with rather irregular, flat, radiating ribs ; 
white, lower spotted ; upper valve with two separate scars ; the 
upper one ohlong, longitudinal, the lower one much smaller, cir- 
cular. 
Placunanomia colon. Gray, P. Z. S. 1849, 123. 
Hab. ? 
Mr. Cuming’s collection (no. 10). Mr. Humphrey’s collection 
a single upper valve of a rather young shell. 
2. ANOMIA. 
Upper valves with three suhcentral muscular scars; byssal notch 
distinct ; the upper part of the anterior lobe of the notch separate 
from and often partially overlapping the front of the cardinal 
edge ; the plug thick, elongate, entirely shelly, and quite free 
from the edge of the notch. 
C 
