SPOLIA ZEYLANICA. 193 



STALKED BARNACLES (CIRRIPEDIA PEDUNCULATA) 

 THE COLOMBO MUSEUM. 



By N. Annandale, D.Sc. 



(^Deputy Stiperintendent of the Indian 3hispnm.') 



A MONG the Cirripedes in the Colombo Museum I have been 

 ■^-^ able to identify the following : — (1) Lepas anserifera, Linn., 

 the commonest pedunculate form on floating objects in this part of 

 the Indian Ocean ; (2) Dichelaspis piellucida, Darwin, a somewhat 

 scarce species only taken on sea-snakes ; and (3) Dichelaspis 

 equina, Lanchester, which was not described until about three years 

 ago [Lanchester, P. Zool. Soc, London, 1902 (2), p. 375] but appears 

 to be common on shallow-water crabs of the east coast of India 

 as well as in some parts of Malaya. 



The specimens of L. anserifera are attached in dense masses to 

 pieces of wood and to a bottle ; those of D. pellucida are scattered 

 on the body of a sea-snake {Hydrus ifluturus) ; while D. equina 

 is represented by numerous individuals crowded together on the 

 posterior walking legs and carapace of a Dorippe dorsipes (Linn.), 

 and by others scattered on the dorsal and ventral surfaces and 

 mouth parts of Scylla ser^^ata (Forsk.). 



The distribution of L. anserifera is world-wide. So far as I 

 am aware, neither species of Dichelaspis has been reported 

 hitherto from the immediate neighbourhood of Ceylon. D. equina 

 was described from the east coast of the Malay Peninsula, while 

 D.,peUucida is an Oriental species which probably has a fairly 

 extensive distribution. 



Dichelaspis tenuivalvata, sp. nov. 

 Diagnosis. 



Capitulum compressed ; carinal edge rounded ; occludent edge 

 sinuous, slanting outwards from above ; lower edge straight, 

 horizontal ; opening large. Five imperfectly calcified plates ; 

 carina not reichiiig the upper edge of the capitulum above, 



