62 PKOCEEDES'GS OF THE GEOLOGICAL SOCLETY. 



with thick beds of white tabular quartz and quartzose sandstones, 

 coloured red in part, which are evidently altered sandstones ; and 

 their relation to the adjoining rocks is well exemplified in the cliffs 

 which form the south-western point of the island, where the quartz 

 rocks are seen distinctly interstratified between beds of light-grey 

 and purple sandstone. 



Beginning at the extreme south-eastern coast of the island, and 

 going west a distance of about 150 yards, the strata are seen in the 

 cliffs dipping jS". 70° W., at an angle of 30°, in the following ascend- 

 ing order : — • 



1. White micaceous granular sandstone. 



2. White and light-gveen softish micaceous sandstone, with bands of purple 



highly micaceous sandstone. 



3. Purple highly micaceous sandstones, moderately hard, and dipping regu- 



larly. Impressions of Fucoids. 



Going westward, these sandstones disappear under covered ground, 

 and are no more seen until arriving at the north-western side of the 

 island, when sandstones come in again under the quartz rocks which 

 form the intermediate strata of the island, and, gradually rising 

 from under them, form the whole coast-line of the northern side 

 of the island, in the following descending order, going east. Im- 

 mediately under the quartz rocks are : — 



1. Purple and white sandstones. 



2. Eed highly micaceous soft sandstones, with bands of whitish micaceous 



sandstone, dipping S. 35° W., at 26°, forming cliffs fully 100 feet in 

 height around the north-western side. 



3. White and purple soft sandstones, dipping same as No. 2 beds, and form- 



ing cliffs about 100 feet in height. 



4. White sandstones, forming the extreme north-eastern point of the island 



and a short distance round the eastern side. 



In the remains of animal life the strata of this island are singu- 

 larly bare, none having yet been discovered ; and the same may be 

 said of the vegetable forms of life, with the exception of two speci- 

 mens of Fucoids, found in the purple sandstones of the southern 

 side. I had hoped that the sandstones would afford the remains of 

 fishes, but as yet I have not been successful in finding even the 

 slightest trace of them. 



8. Island of Niandros. — The strata are composed entirely of white 

 quartz, the beds of which are distinctly seen to be stratified, and 

 dipping from S. 75° W. to S. 55° W., at an angle of from 40° to 

 60° ; and they are evidently a continuation, upwards, of the Devo- 

 nian rocks of the Island of Prinkipo. 



9. Island of Plati. — Geologically speaking, this island is a mass 

 of white quartzose rocks, evidently altered sandstones, reaching to a 

 height of 60 or 80 feet above the sea-level. The dip of the beds is 

 very distinctly seen in an artificial cave, near the landing-place and 

 on the north-west side of the island, varying from S. 10° W. to 

 S. 30° W., at an angle of 20°. The strata may safely be reckoned 

 as Devonian, and form, in all probability, the extreme verge of the 

 series in a south-westerly direction. 



