﻿24 Bulletin 18 50 



Explanation of Plate 4 



Page 

 Fig. 1. Pleurotomaria hunterensis Cle 16, 42 



This figure shows the characteristic coiled ap- 

 pearance of the weathered specimen which are 

 commonly seen on weathered surfaces. 



2. A section through the apex of an imperfect 



specimen showing the position of the whorls 

 and the width of the umbilicus. 



3. Lingida ovata, sp. nov 19, 45 



Ventral (?) valve of a perfect specimen. 



4. Callograptus salteri (?) Bill 20, 46 



A cast of the exterior, 



5. Edmondia (?) arcuata, sp. nov 18, 44 



Right valve of an unusual form. 



6. Right valve of a typical specimen. 



7. Left valve of the usual size. 



