[CEYLON PEAEL OYSTEE FISHEEIES- 1906 SUPPLEMENTAEY EEPOETS, No. XXXI.] 



REPORT 



ON THE 



CIRRIPEDIA 



COLLECTED BY 



Professor HERDMAN, at CEYLON, in 1902. 



BY 

 N. ANNANDALE, D.Sc, C.M.Z.S., 



DEPUTY SUPERINTENDENT OF THE INDIAN MUSEUM, CALCUTTA. 



[With NINE TEXT ILLUSTRATIONS.] 



INTRODUCTORY. 



I have to thank Professor Herdman for sending his Ceylonese Barnacles to me 

 for description. The collection is small, including examples of only eleven species ; 

 but some of these species are of considerable interest. Indeed, so little is known 

 of the Indian Cirripedes that any specimens with accurate localities are of value. 

 Professor Herdman has asked me to add to my report a list of the species known 

 from Ceylon and the Gulf of Manaar. I have interpreted the request freely, adding 

 notes as well as names in the case of forms of which I have examined specimens, even 

 if they are not represented in the collection under review. 



Every addition to our knowledge of the Barnacles tends to prove the wide 

 distribution, not only of genera, but even of species and varieties. It is, therefore, 

 impossible to draw precise geographical conclusions from the presence of any form 

 in a local fauna, while its absence often means no more than that it has not been 

 observed. The following list, in which the species obtained by Professor Herdman 

 are indicated by a star, gives the names and known distribution of those recorded 

 hitherto or for the first time in the present Report. There can be no doubt that 

 further research will greatly increase the number found both in the Gulf of Manaar 

 and in the Bay of Bengal. 



