THO:\rsoN, — Geology of Middle Waipqra and Wela Pass District. 395 



the 900 or more feet of strata from the Weka Pass stone to the uppermost 

 Momit Brown beds, and in Oamaru range through a similar thickness of 

 beds wliich probably formed at much the same rate. This suggests that 

 the whole of the Oamaruian is represented in the Waipara sequence, and 

 that the Weka Pass stone correlates with the Ngaparan and Waiarekan, 

 and the uppermost Mount Brown beds with the Awamoan. 



The general conclusion to be derived from the evidence of the 

 MoUusca is, then, that taken by itself it is not conclusive as to exact cor- 

 relation with Oamaruian stages, and does " not stand in the way of the 

 positive correlations demanded by the brachiopods and Foraminifera. 



The range of the brachiopods occurring in the district is shown in the 

 following table : — 



Table VII. — Range of Tertiary Brachiopods from the District. 



2 I 3 4 5 6 7 



10 



Aetheia gaidteri (Morris) 

 Hemithyris nigricans (Sow.) 

 Terebratulina suessi (Hutt.) 

 Terebratulina of. cancellata Koch 

 Bouchardia mininm Thomson 

 Magadina waiparensis Thomson 



browni Thomson 



Rhizotkyris curlosa Thomson 



media Thomson 



scutum. Thomson 



rhizoidn (Hutt.) 



elongata Thomson 



curta Thomson 



crassa Thomson 



— — elliptica Thomson 

 fortis Thomson . . 



obesa Tliomson 



- lateralis Thomson 



pirum Thomson 



ovata Thomson 



amygdala 



Pachymagas cottoni Thomson 



bartrumi Thomson 



clarkei Thomson 



haasti Thomson 



hectori Thomson 



parki (Hutt.) 



McKayi Thomson 



morgani 



coxi Thomson 



huttoni Thomson 



andrewi Thomson 



Waiparia abnormis (Thomson) 



intermedia Thomson . . 



Neothyris campbcllica (Filhol) 



ovnlis (Hutt.) 



novara (Iher.) 



• iheringi Thomson 



— — anceps Thomson 

 Stethothyris sufflata (Tate) . . 



X 



+ 



+ 



X 



+ 

 + 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 

 ? 



+ 

 cf. 



+ 



+ 

 + 

 + 

 + 

 + 

 + 



+ 

 + 



X 



X 

 X 

 X 

 X 



X 



X 

 X 

 X 



X 



X 



X 



X 

 X 

 X 

 X 

 X 

 X 



w 

 w 







b 

 b 



b 

 b 



b 

 b 



b 





 



o 



H 

 H 

 H 



H 

 H 

 H 

 H 



ii 



H 

 H 

 H 



H 

 H 

 H 



H 



A 

 A 



A 

 A 



W 



w 

 w 



Column. 



1. Weka Pass stone. 



2 Lowest Mount Brown limestone (C). 



.?. Second Mount Brown limestone. 



4. Main Mount Brown Limestone (D). 



5. Uppermost Mount Brown beds. 



Column. 



6. Waiarekan. 



7. Ototaran. 



8. Hiitchin^onian. 



9. Awamoan. 

 10. Wan<?anuian. 



The letters in columns 6-10 are the initials of the stage-names, which help to o-uide 

 the eye better than an asterisk. 



