DR. HECTOR ON THE GEOLOGY OP NEW ZEALAND. 



55 



character of a littoral or shallow-water calcareo-arenaceous deposit, 

 rich in distinctive fossils associated with other forms that are com- 

 mon in the underlying formations. The stratigraphical position of 

 the Ototara group, as the upper part of what for convenience of 

 mapping, I have termed the Cretaceo-Tertiary formation, is shown 

 in the following general schedule, in which the local names and sub- 

 divisions used in surveying have been suppressed, and a comparison 

 attempted with European formations : — 



Physical Character. 



a. Fluviatile and littoral. j ., 

 Fluviatile, extended glaciers. \ ■ , 

 Fluviatile, oldest gold-drift. J P erlocU 



b. Marine, craglike and conglomerates. 



a. Marine, argillaceous, concretionary. 

 Marine, arenaceous, concretionary. 

 Marine calcareous. 



b. Estuarine lignitiferous. 

 fa. Ototara group — calcareous sandstone. 



b. Chalk and marl. 



a. Marine, ferruginous clays and green- 

 sands. 



b. Estuarine, gravels and hydrous brown 

 coal; chief Saurian beds. 



j a. Fluviatile grits and conglomerates ; 

 j anhydrous brown coal, 



b. Marine, grits, green and grey sand- 

 stone. 

 I Green sandstone and shales, with thin 

 coal, Pecopteris, Tceniopteris, &c. 

 I Red and blue marlstones. 

 ^ Conglomerates and shales, plant-beds. 



About 320 specimens of fossil Mollusca and Echinodermata have 

 been described from the first seven of the foregoing divisions, the 

 collections having been made from 90 different localities* ; and I 

 have prepared the following Table to show the actual number of 

 recent and extinct species, comparing the recent fauna with the 

 Upper, Middle, and Lower Tertiary and Cretaceo-Tertiary forma- 

 tions, omitting those which are of doubtful specific identity or 

 stratigraphical position. 



Formation. 



I. Recent and Postpliocene. 

 II. Upper Pliocene. 



III. Older Pliocene. 

 IV. Upper Miocene. 

 V. Lower Miocene. 

 VI. Upper Eocene. 



VII. Cretaceo-Tertiary. 

 VIII. Middle Cretaceous. 



IX. Lower Cretaceous. 



6 



"o 

 ts 

 o 



OQ 



8 





X. 



s3 



Jurassic. 



1 



1 



XI. 



Liassic. 





XII. 



Trias. 





Univalves. 



Bivalves. 



Brachio- 

 pods. 



Echino- 

 derms. 



Totals. 



Formations. 



R. 



Ex. 



R. 



Ex. 



R. 



Ex. 



R. 



Ex. 



R. 



Ex. 



Recent 



285 



67 



30 



7 







14 

 60 

 28 

 13 



87 



134 



45 



22 



4 







9 



33 

 46 



28 



71 



9 

 6 



2 

 2 



"O 

 3 



8 

 9 



10 



26 

 3 

 1 

 1 

 



"0 

 3 

 7 



20 



26 



454 



120 



55 



14 



23 

 109 



89 

 70 



194 



II. Ill 



IV. V 



VI 



VII 



Extinct species, 

 II.-VII 



* Catalogue of Tertiary Fossils in the Col. Museum, by F. W. Hutton, Assist. 

 Geologist. New Zealand, 1873. 



