[CEYLON PEABL OYSTER FISHERIES 1906 SUPPLEMENTARY REPORTS, No. XXXVI.] 



REPORT 



ON THE 



FORAMINIFERA 



COLLECTED LY 



Professor HERDMAN, at CEYLON, in 1902. 



BY 

 AY. J. DAKIN, B.Sc, 



ZOOLOGICAL DEPARTMENT, UNIVERSITY OF LIVERPOOL. 



[With ONE PLATE and TEXT-FIGURES.] 



The collection of deposits from the various places where dredgings were taken during 

 the Ceylon expedition has revealed, in most cases, a great abundance of Foraminifera, 

 and this is especially true with regard to a few species which in some cases make up 

 the greater part of the deposit. The material which I have worked through for the 

 purpose of this report had been taken mainly from (1) several stations in the Gulf of 

 Manaar, (2) Palk Bay (north of Adam's Bridge), (3) off Trincomalee, and (4) off 

 Galle, to the south of the island. The material from the different dredgings in the 

 Gulf of Manaar has yielded the greatest abundance of species, and that from Galle 

 and the south of the island generally the most interesting forms, especially where, 

 from the 100 -fat horn line, about 12 miles off the land, the bottom was composed of a 

 unique marine foraminifera! deposit, composed solely of a new species of the genus 

 Ramvlina. In the shallower waters off Galle, however, foraminifera were much less 

 abundant than at corresponding depths in the Gulf of Manaar. 



The deposits examined were mostly from depths of less than 40 fathoms, and the 

 collection consists, therefore, mainly of shallow-water species, and there is but little 

 difference between the various samples, except as regards the numerical proportions 

 m which certain forms occur. One of the most interesting points is the great 



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