5 Gy Ws 
a. b. 
a, 6. 
5 Ch 
Oui im os 
a, O. 
. a—c. Nucula tumescens, page 121. 
TABLE XVIII. 
sphenoides, p. 119. 
Headonensis, p. 113. 
lissa, p. 118. 
ampla, p. 108. 
— var. contigua, p. 108. 
Dixon, p. 112 
— var. planiuscula, p. 112. 
— var. quadrans, p. 112. 
minor, p. 114. 
similis, p. 118. 
— var. trigona, p. 118. 
curvata, p. 112. 
bisulcata, p. 109. 
Bowerbanku, p. 109. 
protracta, p. 117. 
The lines indicate the size of the specimens. 
Mus. Edwards. 
? 
2? 
