356 Transactions. 



Oamaru locality is rich in small species, which perhaps points to in- 

 sufficient collecting in the Canterbury locality ; but certain larger forms 

 present in one list are wanting in the other. For example, we do not find, 

 in the former, species of Astraea, Calliostoma, Cardium, Cxcullaea, Lima, 

 Mactra, Mytihts, Pecten, Struthiolaria, Trochus, and Turbo, or find them 

 comparatively rarely ; while the latter are relatively poor in species of 

 Bathytoma, Dentalium, Drillia, Latirus, Mangilia, and Tufris. By the 

 kindness of Mr. Morgan, Under-Secretary for Mines, I have been allowed 

 to see the lists of fossils to be published in the forthcoming bulletin on 

 the Oamaru District, by Professor Park, and I find that this discrepancv 

 is not sensibly removed even with longer lists. There does seem, however, 

 to be a slight preponderance of extinct forms in the species predominant 

 at Castle Hill over those common at Target Gully, which indicates a 

 rather older set of beds at the former place. 



On comparing the list of fossils with that obtained by the author at 

 the Lower Waipara Gorge* it is found that the resemblance is closer, the 

 only marked difference being the presence of the numerous oysters of various 

 species at Waipara, whereas they are practically absent from the mid- 

 Canterbury district. There is a remarkable similarity in the percentage of 

 Recent forms from both these localities, which suggests an approximately 

 identical age. I have not been able to compare these lists with those from 

 the beds in similar position in the Weka Pass section, as they have not 

 been published up to the present date ; and in face of the fact that these, 

 and others of equal value for the purpose of correlation of our Tertiary 

 series, are likely to appear at an early date, it seems unwise to comment 

 further, or to attempt to draw conclusions which may be entirely upset 

 after a consideration of fuller evidence. 



Art. XXIV. — An Unrecorded Tertiary Outlier in the Basin of the Rakaia. 

 By R. Speight. M.Sc, F.G.S., Curator of Canterbury Museum. 



[Read before the Philosophical Institute of Canterbury, 6th December, 1916; received by 

 Editors, 30th December, 1916 ; issued separately, 30th October, 1917.]] 



The following is a brief note on some of the features of a hitherto unrecorded 

 occurrence of Tertiary sedimentary beds at the head of the Harper River, 

 a tributary of the Wilberforce, one of the main feeders of the Rakaia. This 

 river rises in a saddle between the northern end of the Craigieburn Range 

 and Mount Misery, and flows in a straight narrow valley in a south-west 

 direction for some fifteen miles till it joins the Wilberforce. It receives its 

 principal supply of water from two tributaries — first of all, an unnamed 

 stream which joins it about three miles from its source, rising at the eastern 



* R. Speight, A Preliminary Account of the Lower Waipara Gorge, Trans. N.Z. 

 Inst, vol. 44, 1912, p. 231. 



