!«-■:] 



On the otlier hand, the similarity between the fossil 

 contents of the Wandrawandian Series and the Gerringong 

 Series is exemplified by the following table, where it will 

 be seen that most of the genera, abundant in the one form- 

 ation, are found in the other, though a considerable vertical 

 range separates the two. In pointing out this similarity, 

 it is meant not so much to denote a large percentage of 

 common species, but has reference rather to the numerical 

 proportions of the various genera. Thus in both the Wan- 

 drawandian and the Gerringong Series, pelecypods are 

 remarkably abundant, such types as the Pecten group, 

 Pachjldomus, Stulchbiti-iu, Astarlila, Chaciiomija, Mneonia 

 etc., being very abundant in the two formations, while the 

 proportion of the common brachiopods such as Martiniopsis, 

 Spirifera and Diclasma to these is about the same, 

 able comparing the Fossil Contents of the Southern sub-divisions of rl 

 Upper Marine Series. 1 



