394 



FOSSILS FROM PERIM ISLAND. 



and age of tlie tertiary beds along the coast of tlie northern 

 Concan. In regard to what is known, Dr. Lush describes 

 the sandstone of Bombay as appearing as Mahim, Seergaum, 

 and Danu in horizontal strata, and ' evidently above the 

 trap.' At Grundavie the shell sandstone disappears, and 

 beds of clay and kunkur present themselves in the line of 

 section from Gundavie to Surat. From this point to the 

 Keem River nothing is seen but the ' black cotton soil ;' on 

 the right bank of the Keem, sandstone and conglomerate 

 are exposed, according to Dr. Lush, in the following order : — 



Section on the Right Bank of the Keem. 



1. Alluvial soil with masses of conglomerate 



2. Horizontal beds of sandstone in thin layers 



3. Sandstone ......... 



4. Coarse conglomerate (bed of the river). 



6 feet 

 3 feet 

 5 feet 



Respecting the Kattiwar coast, nearest which Perim Island 

 is placed, Dr. Lush mentions the conglomerate as reappear- 

 ing at Gogah, close to the island, where masses of the rock 

 containing shells are dug out of the beach. This conglome- 

 rate appeared to him to contain no fragments of trap, 

 although the central ridge of Kattiwar, including the hill of 

 Politana, is composed of trap, which is also seen at Bhow- 

 nuggur.^ Captain Fulljanies states that he has found ' a simi- 

 lar formation to that of Perim all along the coast from Gogah 

 to Gossnath Point, where a firm sandstone is qut*,rried, and 

 of which the splendid Srawak temples of Politana^ are built.' 

 Captain Fulljames, in a separate paper,^ gives an account of 

 the strata passed through, in an experimental boring at the 

 town of Gogah. Of the 320 feet mentioned in the section, the 

 uppermost 74 include of sand and gravel, 11 feet ; stiff black 

 clay, 6 feet ; sand and clay, 10 feet ; soft sandstone, alternating 

 vdth thin seams of different coloured clays, sand, and gravel, 

 13 feet; and lowermost, a very hard siliceous sandstone, 9 

 feet thick. The inferior portion of the section is composed of 

 a great bed of dark clay, which has been penetrated down to 

 246 feet, containing pyrites and broken shells. The whole 

 of this mass appears to be above the conglomerate, but it is 

 not shown whether the absence of the clay deposit at Perim 

 is owing to denudation or to its upheaval before the clay 

 on the coast was deposited. Captain Fulljames states that 

 he had discovered fossil remains, like those of Perim Island, 

 down the coasts towards Gossnath, and in a similar formation. 



The first announcement of the Perim fossils is given in a 



' Dr. Maleolmson, however (vide jjos^ra, 

 p. 404), mentions the occurrence of trap 

 pebbles in these same tertiary beds. 



^ Pattitona (of Fulljames). — [Ed.] 

 ' Jour. Asiat. Soc. of Beng., vol. vi. 

 p. 787. 



