248 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 24, 



white compact, rather argillaceous sandstone, which among others 

 contains the following fossils : — 



Fossils from Point Puer. 



Producta rugata. Pterinea macroptera/ ^'^^^ H^;, 



"■" Spirifer subradiatus. Orthonota compressa.^- - ?^.'^^- 



crassicostatus, MSS., sp. n. AUorisma, n.s. 



Stokesii. Pachydomus carinatus. 



Vespertilio. Pecten squamuliferus. 



Eagle Hawk Neck, the connecting link of Tasman's and Forrester's 

 Peninsulas, is one of the celebrities of Tasmania, on account of the 

 peculiar jointed structure of its rocks, forming what is called *' the 

 tessellated pavement." The rock is a very hard, brittle, fine-grained 

 and compact grey sandstone or gritstone, lying in a horizontal posi- 

 tion. It occasionally contains pebbles of granite, porphyry, or quartz 

 rock. 



The rocks abound in fossils, especially at the south point of Pirates' 

 Bay. Among others I collected fine specimens of the following : — 



Fossils from Eagle Hawk Neck. 



Fenestella internata. Spirifer subradiatus. 



Producta rugata. Vespertilio. 



Spirifer crebristriatus. Platychisma cuius } 



Darwinii. Pachydomus carinatus. 



avicula. 



On the opposite side of Norfolk Bay is a small peninsula about 

 three miles across, in which is a large convict-station called The Mines. 

 The mass of this piece of land consists of sandstone with some trap, 

 but immediately at the back of the station is a small colliery. A bed 

 of coal of slight thickness and extent is here worked. The following 

 was the shaft-section as given me by the overseer : — 



Yards. 

 " Ironstone" (a fine-grained trap rock) . . 20 



Sandstone ., 20 



Sandstone and shale 10 



Coal ::..:.. \\ 



This coal, which in the deepest part is about seven or eight feet thick, 

 rises pretty rapidly in every direction from that point, and as it rises, 

 it thins out to about two feet. It thus forms a small basin, not half 

 a mile across, and its outcrop is everywhere covered by beds of loose 

 sand. A httle beyond its outcrop on the sea-shore was the following 

 section : — Yards. 



Trap (in small prismatic pieces) 7 



Sandstone, formed of grains of some trap rock, . 18 



Sandstone, soft and rather shaly 6 



Shale and bind 2 



Coal Oi 



Near this spot they had bored to a farther depth of nearly 100 yards 

 and passed through one twenty-inch coal ; but the rest of the mass 

 was almost entirely sandstone. I got from these coal-measures fossil 



