[CEYLON PEARL OYSTER FISHERIES 1905 SUPPLEMENTARY REPORTS, No. XXL] 



REPORT 



ON THE 



OPISTHOBRANOHIATE MOLLUSCA 



COLLECTED BY 



Professor HERDMAN, at CEYLON, in 1902. 



BY 

 GEORGE P. FARRAN, B.A., 



ASSISTANT NATURALIST (FISHERIES BRANCH) DEPARTMENT OF AGRICULTURE AND 

 TECHNICAL INSTRUCTION FOR IRELAND. 



[With SIX PLATES.] 



There are about 50 species of Opisthobranchs in tbe collection, and of these 16 are 

 now described as new to science. 



The Report is divided into two sections, I. Nudibranchfata and II. Tecti- 

 branohiata, with an Appendix containing (1) Onchidium and (2) Marsenia. 



I. NUDIBRANCHIATA. 



The collection of Nudibranchs made by Professor Herdman in Ceylon and handed 

 over to me for identification amounts to 30 species. Of these 9 must be described as 

 new, 12 are fairly well known tropical species, 4 are now identified with species 

 previously described by Abraham or by Quoy and Gaimard, but of which little was 

 known, and 5 are too small to identify satisfactorily. 



The list of species is as follows : 



Hervia ceylonica, n. sp. Doto sp. 1 



Galvi'na prodwta, n. sp. Melibe fimbriate, A. and H. 



Eolis sp. 1 Scyllcea pelagica, L. 



,, sp. t Plewrophyllidia formosa, Kel. 



2 u 



