part 3] 



THP: TEIAS of >'EW ZEALATs'D. 



167 



used this substance during my work on the Triassic fossils, which 

 are often unsatisfactorily preserved. 



In the present paper forty-six genera of mollusca and brachiopoda 

 are described, of which three seem to be hitherto unde^cribed and 

 are regarded as new, and seventy-eight species, of which forty-one 

 seem to be new, together with five or six new or local varieties of 

 species already known. This certainly falls considerabh'^ short 

 of the- total which must exist in the New Zealand Trias. There 

 are several conspicuous fossils which are too badl}^ preserved, or 

 otherwise unsuitable, for adequate illustration or description ; but I 

 hope that in the future better-preserved specimens of these and 

 other forms may be found. 



For the zonal divisions I have relied primarily on my own 

 collecting; but, where better specimens than those that I found 

 existed in the Survey collections, I have made use of these for 

 description, though in most cases only where the recorded localities 

 are confirmed by my own collecting. 



II. NOMEXCLATUEE A]N^D COEEELATIOX. 



Great divergence of opinion has existed among New Zealand 

 geologists concerning the classification of the rock series inter- 

 mediate between the Keef ton and Baton-River Series, which contain 

 a marine Silurian or Devonian fauna, and the beds commencing 

 with the Bastion Series which ^deld a lower Jurassic marine fauna. 

 Hector classified them as follows in 18S6in his 'Handbook of New 

 Zealand Geology.' In the right-hand column I add the equivalents 

 which I suppose these divisions to represent, after my examination 

 of the faunas. 



Jurassic. 



Lias. 



Trias. 



Permian. 



Carboni- 

 ferous. 



Devonian. 



- Upper 

 Silurian. 



8 a. Matauia Series. 

 8 h. Putataka Series, 



8 c. Flag- Hill Series. 



9 a. Catlin's-River Series, 

 9 b. Bastion Series. 



10 a. Otapiri Series. 



10 6. Wairoa Series. 



11 a. Orefci Series, 

 11 b, Kaihiku Series, 



'12 a, Maitai Series, 



12 b, Maitai Limestones, 



13 a. Te Anau Series. 



13 b, Kakanui Series. 



14 a, Baton-River Series. 

 14i) & c. Limestones and 



serpentine. 



I Higher Jurassic series, with marine faunas 

 C as high as the Tithonian. 



[Lower Jurassic beds, with marine faunas of 



J Liassic, and probably also of Bajocian age. 



^Rhsetic and Upper Noric beds. 



= Lower Noric and Higher Carnic beds. 



= Lower Carnic beds. 



= Beds with a Ladino-Carnic marine fossil 

 horizon near the top, and a great thickness 

 of unfossiliferous beds below, representing 

 Middle and possibly Lower Trias. 



= Maitai Argillites, with Aphanaia 

 De Koninck. 



= Maitai Limestone, with brachio- 

 poda, etc. 



1 Probably in part metamorphosed Maitai 



J Beds, 



I Silurian or Devonian, horizon not yet deter- 

 f mined. Limestones with marine fauna. 



F. W. Huttoni in 1885 included the Te Anau and the Maitai 



1 Q, J, G, S. vol, xli (1885) pp, 191-220. 



p2 



