Hector. — On the Fossil RejJtlUa of New Zealand. 357 



k. Boulder Sands (100 feet). — Dark grey, laminated, naicaceous sands, 

 "with large spheroidal calcareous concretions, containing Mauisaurus 

 haastii, Plesiosaurus traversii, P. hoodii, Folycotylas tenuis, Leiodon 

 haumuriensis, and Taniwhasaurus oweni ; also Aporrhais ornata and 

 Ostrea. 



I. 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. 



III. — Amuri Group. 



Strike nearly N". and S. 



m. Black Grit (20 feet). — Fine-grained grit of small, water-worn pebbles 

 of green and white quartz, and a small quantity of titaniferous ii'on, in 

 a grey calcareous matrix. Fossils abimdant, but all rolled. 

 Belemnitella, Pecten ohovatus var., Radula, Plagiostoma, Inoceravius 

 cuvieri, Trigonia sulcata, Mytilus. Fragments of bone and teeth, 

 chiefly of fishes, but also Saurians — Polycotylus, Plesiosaurus. 



n. Grey Sandstone (130 feet).- — Compact calcareous sandstone, formed in 

 parts almost entirely of shells. 



Panopcea i^licata, Trigonia sulcata, Eriphylla{posinia)haumura, Axincea 

 (Pectunculus) cuneiforme, A. cardioides, Inoceramus multiplicatus, 

 I. mytiloides, I. haastii, I. simjylex, Aucella plicata, Radula, Alaria, 

 Turbo, Pleurotomaria, Neptuncea, Ostrea, Crenella, Belemnites auch- 

 landicus, B. compressus, n. sp. Fragments of bone, teeth, and scales of 

 fish. 



0. Calcareous Conglomerate (70 feet). — Light grey calcareous sandstone, 

 with pebbles interspersed, chiefly of black siliceous sandstone and 

 layers of fossils, principally jSe^emmfes and fish teeth. 



lY. — 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 Tceniopteris, Camptopteris, Pecof^teris, 

 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 a 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. 



