NOTICE TO AUTHORS. 

 Authors of Papers are urgently requested to send in all 

 Drawings, Diagrams, or other Illustrations in a state suitable 

 for direct photographic reproduction. They should be drawn 

 on a large scale, in Indian ink, on a smooth white surface. 

 Where illustrations are numerous, much time would be saved 

 if authors would indicate in advance those considered essen- 

 tial to the understanding of their papers. 



NOTICES TO FELLOWS OP THE ROYAL SOCIETY. 



The Offices and Library will be closed for the Easter Recess from 

 (and including-) Thursday, March 31, to the end of Easter week. 



The Council have directed that the Minutes of the Meetings of the Society shall 

 be sent out as an inset in the ' Proceedings,' separately paged; and shall afterwards 

 be republished in the ' Year-Book.' 



The 1 Proceedings ' are sent by post to every Fellow of the Society who resides 

 within the limits of the Postal Union. The 'Philosophical Transactions' are 

 delivered only to those Fellows who call for them, or who send a written applica- 

 tion to the Assistant Secretary. Such an application may, if so desired, be filed as 

 a standing order. 



■ The separate Papers forming the ' Philosophical Transactions ' will be sent post 

 free, as issued, to those Fellows who prefer to have them in that form. And, on 

 application to Messrs. Harrison and Sons, 46, St. Martin's Lane, these will be bound 

 in a cloth case for 2s. 6d., or the cloth cases for binding may be purchased, 

 price 1*. 6d. 



Demy 8vo, Cloth, 12$. 6^., with Plates and Woodcuts, 427 pp. 



THE RECORD OF THE ROYAL SOCIETY. 



SECOND EDITION, 1901. 



Containing an account of the Foundation and Early History of the Society, its 

 Benefactors, Trust Funds, &c, with Chronological and Alphabetical 



Lists of the Fellows from the Foundation. 



Just .Published. Eoyal 4to. 307 pages and 27 Plates. Price 20*. 

 To Fellows of the Royal Society, 15s. 



REPORT TO THE GOVERNMENT OF CEYLON 



ON THE 



PEARL OYSTER FISHERIES OF THE GULP OF MANAAR. 



By W. A. Herdman, D.Sc, F.R.S. 



With Supplementary Reports upon the Marine Biology of Ceylon 

 by other Naturalists. 

 Part I. 1903. 



Published by the Eoyal Society and sold by 

 HARRISON AND SONS, ST. MARTIN'S LANE. 



