Hector.—On the Fossil Reptilia of New Zealand. 357 
k. Boulder Sands (100 feet).—Dark grey, laminated, micaceous sands, 
with large spheroidal calcareous concretions, containing Mauwisaurus 
haastii, Plesiosaurus traversit, P. hoodii, Polycotylus tenuis, Leiodon 
haumuriensis, and Taniwhasawrus oweni; also Aporrhais ornata and 
Ostrea. 
l. Gypseous or Sulphur Sands (400 feet).—Dark grey and brown false- 
bedded sands, coarse and fine in grain, the upper part being greensand. 
No fossils, but contains pyrites and gypsum, with coaly streaks* and 
silicified wood. The weathered surface often covered with a sulphur 
yellow efflorescence., 
IIL—4mwri Group. 
Strike nearly N. and 8. 
m. Black Grit (20 feet).—Fine-grained grit of small, water-worn pebbles 
of green and white quartz, and a small quantity of titaniferous iron, in 
a grey caleareous matrix. Fossils abundant, but all rolled. 
Belemnitella, Pecten obovatus var, Radula, Plagiostoma, Inoceramus 
cuvieri, Trigonia sulcata, Mytilus. Fragments of bone and teeth, 
chiefly of fishes, but also Saurians—Polycotylus, Plesiosaurus. 
m. Grey Sandstone (130 feet).—Compact calcareous sandstone, formed in 
parts almost entirely of shells. 
Panopea plicata, Trigonia sulcata, Eriphylla(Dosinia) haumura, Axinea 
(Pectunculus) cuneiforme, A. cardioides, Inoceramus multiplicatus, 
I. mytiloides, I. haastii, I. simplex, Aucella plicata, Radula, Alaria, 
Turbo, Pleurotomaria, Neptunea, Ostrea, Crenella, Belemnites auck- 
landicus, B. compressus, n. sp. Fragments of bone, teeth, and scales of 
fish. 
о. Calcareous Conglomerate (70 feet).—Light grey calcareous sandstone, 
with pebbles interspersed, chiefly of black siliceous sandstone and 
layers of fossils, principally Belemnites and fish teeth. 
IV.— Jurassic. 
Green argillaceous sandstones and shales, with spherical concretions and 
obscure plant remains. These resemble the plant beds, or Mataura series, 
of the south of Otago, and the Putataka beds, in part, of the North 
Island, which are characterized by Tæniopteris, Camptopteris, Pecopteris, 
and Conifers, accompanying irregular seams of coal. There is distinct 
unconformity between these strata and the foregoing, and on the western 
side of a narrow ridge of these jurassic rocks the same section is again 
repeated in ascending order on the eastern side of а syncline. But on 
following the beds to the western side of the same syncline, the lower members 
* Pitch-brown coal, non-caking—water 14, carbon 54, ash 5. 
