44 Carter on the Persian Gulf. [No. 1. 



again in each, we have most of the characters of the foregoing islands, 

 viz., green trap-diorite, specular iron-ore, gypsum, salt, sulphur, &c, 

 as well as a white calcareous grit containing semi-fossilized shells, 

 similar to that which caps the clay on the island of Kishm, but the 

 clay appears to be absent. Here the calcareous deposit is identical 

 with that which I have called " Milliolite," on the south-east coast 

 of Arabia and with that " free-stone" from Khattiawar imported at 

 Bombay under the name of " Porebunder Stone." That from Polior 

 and the Great and Little Tombs contains a large cancellated Lucina, 

 characteristic of the same formation at Morbat on the south-east 

 coast of Arabia ; also Tridacna, Avicula margaritifera, or the com- 

 mon Pearl-Oyster, Mstulana, a small ^Echinus, Corals, &c. 



Prom the island of Aboo Moosa, a little to the south of the latter, 

 the characteristic specimens are again the " Milliolite" resting on the 

 veined clay ; and there is a compact yellow limestone peak probably 

 of Eocene age which rises to 370 feet above the level of the sea j 

 but there are no volcanic products here. 



Going back to the Persian side of the Gulf, we have again the 

 " Milliolite" characterizing the islands of Kais,Hindi ArabiandMon- 

 akeyla, all situated very near the shore ; but no longer any volcanic 

 products in either. 



Lastly, we arrive at the islands of Karrack and Khago, which are 

 close together, and about 35 miles north-west of Bushire, Karrack 

 presents the same kind of sedimentary formation as that of the 

 island of Kishm ; but here the clay is changed for a very fiue lamin- 

 ated sandy deposit with little scales of mica, capped, however, as 

 usual with the coarse shelly deposit. 



The rock from Khago is a calcareous gravelly " Milliolite," compos- 

 ed chiefly of rounded pieces of shells firmly consolidated. The same 

 kind of rock also forms the islets of Hargooz, Parsee, Arabi, and 

 El Kran, which are situated near together more towards the Arabian 

 side of the Gulf, about 80 miles south of Karrack. 



Returning to the Persian side, on the mainland opposite Bassadore 

 is a sulphur mine, which is much worked by the Arabs, and about 

 20 miles further on is the town of Linga, close to which are hills of 

 fine diorite like that near Muscat ; and a little to the west of these, 

 we come again upon the sedimentary formation first seen at Kishm, 



