112 Transactions. 
which, he believes, extends through the Awamoan. The fact that basalt 
rests also unconformably on the Dowling Bay limestone shows that volcanic 
activity did not commence till a considerable time after the Awamoan, for 
in most localities sufficient time must have elapsed for this limestone (which 
is the highest marine bed in the district) to have been denuded away 
altogether, and part of the Caversham sandstone besides. 
As regards the Caversham sandstone, the Dowling Bay section presents 
important fresh evidence, and corroborates views held by some previous 
observers. The Waikouaiti sandstone, which is believed to be the equivalent 
of the Caversham sandstone, has not yet been thoroughly investigated, 
though there are indications that several zones with determinable fossils 
better, with the fauna of the Upper Hutchinsonian (basal Awamoan) than 
with that of the true Hutchinsonian. Grange records Pachymagas parki 
(Hutt.) and Thomson (1920, pp. 375-6) mentions P. cottoni Thomson as 
occurring in the Caversham sandstone, and both these range into the 
Awamoan. These facts, together with its general poverty in brachiopods, 
suggest it is of a higher age than Hutchinsonian. On the other hand, it 
8 
highest members of the Awamoan series are without representatives near 
Dunedin, unless they should occur beneath the basalt north of our line of 
section. 
In conclusion, we wish to thank Dr. Benson for drawing the map and 
describing the rock-section, and also for his kindly assistance and advice 
in the preparation of this paper. 
Limopsis producta n. sp. (Fig. 1.) 
Shell moderately large, elongated, and produced posteriorly, thick, 
convex, with fine radial stri 
near posterior end. t 
Fro. 1.—Limopsis producta n. sp. numerous concentrie growth-lines and 
Natural size. few radial striae, similar to the 
