EXPLANATION OF PLATE LI. 
Anacithura robustu Hedley. Type. 
stricta Hedley. Type. 
Pa tumida Hedley. Type. 
Paraclathurellu aditicola Hedley. Type. 
es clothouis Hedley. Type. 
Pseudorhaphitoma fuirbanki Nevill. Type. 
si 5 Apex. 
"a Detail of Sculpture. 
alticostatu Sowerby. Neptune Island, 
South Australia. 
if avicula Hedley. Type. 
‘s bipyramidata Hedley. Type. 
Aa crudelis Hedley. Type. 
darnleyi Brazier. Darnley Island, 
Queensland. 
= imformis Hedley. Type. 
