390 Transactions. 



Precinctive species 



Waiarekan 



Ototaran 



Hutchinsonian 



Awamoan 



Recent species 



The percentage of precinctive species in each of these faunas exceeds 

 that of those ranging upwards into the Waiarekan or higher beds, and 

 justifies Marshall's conclusion that they are both older than Oamaruian. a 

 point upon which I had previously expressed doubt so far as the Hampden 

 beds were concerned. The table also favours the correlation of the two 

 faunas, although it should be noted that only six species are common to 

 both, and these six species are all also Waiarekan.* We may therefore 

 add the Wangaloa and Hampden lists as a fresh column to the analysed 

 Oamaruian lists. 



For stages later than the Oamaruian good lists are not available, and 

 we must await Murdoch and Marshall's account of the Wanganui beds. 

 For the purposes of this paper I have used the lists given by Hutton 

 (1886) for Wanganui and Petane, supplementing them by unpublished 

 determinations by the late Mr. H. Suter. These give a total of 219 species 

 from Wanganui, with 80 per cent. Recent, and of 194 from Petane, with 

 79 per cent. Recent, and aire therefore grouped together and treated as 

 Castlecliffian, though they may contain a few forms from a lower horizon. 

 For the Waitotaran I have taken such published and unpublished records 

 as were available from Waitotara and Patea, the Wairarapa limestone, 

 the Awatere beds, and the Greta beds, omitting the two latter, however, 

 when the correlation of the Greta beds themselves is being discussed below. 

 Finally, I have admitted as intermediate between the Waitotaran and 

 Awamoan the Kawa beds described by Bartrum (1919), together with the 

 basal beds of the Palliser Bay section. The reasons for this will be given 

 more fully below in discussing the Greta beds. 



With this basis we may now attack the correlation of the beds of other 

 localities in other diastrophic provinces. The logical procedure in such a 

 province as that in which the Waipara district lies would be first to com- 

 pile a similar analysis of the range of each species recorded from the Weka 

 Pass stone, the " grey marls," the Mount Brown beds, and the Greta beds 

 in the area within which these rocks can be recognized, and -then to com- 

 pare the lists so obtained with the former list from Oamaru and South 

 t'anterbury. If the correlations can be made without- reasonable doubt, 

 a combined list will extend further our knowledge of the range of the various 

 species, ai^d so on with the other provinces. This programme involves a great 

 deal of further stratigraphical work and collecting throughout New Zealand, 

 and it will be many years before it can be completely carried out. In the 

 meantime I will show the method as applied to the species known from 

 the district at present under discussion. 



Table V gives the lists of species from the various rocks of the district, 

 the Greta beds being also included for convenience. In these columns T 

 signifies that the species was collected by myself, P that it is an additional 

 species from Park's lists of 1905, and H from Hutton's lists of 1885 (b and c) 

 and 1888. For comparison the records in the various stages, compiled as 

 explained above, are also included, S signifying a single record, R that the 

 species is rare (with only two or three records), C that it is common (with four 

 or five records), A that it is abundant, and + and X one or more records. 



They include Gilbertia paucisulcata (Marshall), which Mr. Suter determined in 



my collections from the Waihao greensands. 



