8:2 



INDIAN MARINE SURVEYS. 



to our knowledge of Indian Marine Zoology, more especially in 

 regard to fishes, of "which he has described 44 entirely new to science, 

 and 62 new to the Indian fauna. 



In the spring of 1888 the " Investigator," having completed the 

 examination of the outlying dangers on the west coast of the 

 Andaman group, took a north and south line of deep soundings 

 about 100 miles west of the Andamans and Nicobars from latitude 

 12° 40' to latitude 5° 45' 1ST. In the latter position a submarine 

 elevation was found representing a submerged peak rising 2,000 feet 

 high from the floor of the ocean, about half way between the Straits 

 of Malacca and Ceylon. 



During the recess the following fair charts (with the exception 

 of the 20-inch Porbandar harbour plan) were drafted and forwarded 

 to the Admiralty Eydrographer : — 



Name of Chart or PI 



•Port Blair to Sisters islands 



North Sentinel island 



♦Port Blair 



Maepherson's strait 



West Coral bank 



Middle and South Coral banks - 



Porbandar harbour 



•Porbandar and Navibandar 



•Cannanur to Mahe 



•Plans of Cannanore and Tellicheri 



1 inch to 1 mile. 



; 1 inch . 



I 1 » 

 20 inches 



4 » 



H „ 

 3 „ 



* Photo-ziucographerl for local use. 



The " Investigator " left Bombay harbour on the 20th October, 

 and after having coaled at Colombo carried some deep soundings 

 to the Andamans. Confirmatory evidence was obtained of the 

 existence of the ridge or plateau of 1,700 fathoms found in April 

 1S8S about 170 miles west of the Andamans. Between this ridge 

 and the islands there is a submarine valley of 1,900 to 2,000 

 fathoms, which appears to stretch up from Acheen ; on the west 



