109 



DESCRIPTIONS OF NEW SPECIES OF NON-MARINE SHELLS FROM 

 JAVA, AND A NEW SPECIES OF CORBICULA FROM NEW 

 SOUTH WALES. 



By the Rev. R. Ashington Bullen, F.L.S., F.G.S. 



Read 8th April, 1904, 



PLATE VI. 



The four apparently new species of Javanese land and fresh-water 

 shells are from a small collection of about forty species which I recently 

 purchased direct from the island. A somewhat carinate specimen of 

 Amphidromus palaceus, Mousson, was also obtained from the same 

 source (PI. VI, Fig. 6). Messrs. Sowerby and Fulton, to whom they 

 "were first sent, picked out three species as not represented in their 

 collections, and I have since consulted Mr. E. A. Smith and Mr. E. R. 

 Sykes, with gratifying results. To all these gentlemen mj' sincere 

 thanks are due. 



1. CoRBICULA SUBROSTRATA, n.Sp. PL VI, FigS. 7-9. 



Testa solida, periostraco olivaceo-fusco induta, antice late rotundata, 

 postice aliquanto rostrata, concentrice lirata et sulcata, lii'is versus 

 latus posticum attenuatis, subobsoletis ; umbonos prominentes, contigui, 

 erosi, albi ; superficies interna albida, infra umbones rosacea, et ad 

 marginem ventralem subfusca ; dentes laterales purpurei, striati. 

 Long. 30, alt. 27 mm. 



Hab. — Java. 



Messrs. Sowerby and Fulton dubiously referred this species to 

 C. JavaNZca, Mousson, but as they have no type-specimen and lament 

 the unsatisfactory state of the classification of the Corbiculidae, which 

 needs thorough revision, they do not look upon the identification 

 as final. There are no specimens of the species iii the British 

 Museum, so we are driven to Mousson's figure. There is no resem- 

 blance between the Corhicula in my collection and Mousson's figure, 

 other than a generic one. 



Indeed, the three specimens all. exhibit such a peculiar feature in 

 the formation of a shallow, though well-marked, indentation on the 

 posterior ventral margin, that that region of the shell is somewhat 

 rostrated. The other distinctly rostrated Corhicula with which I am 

 acquainted is the C. MoUkiana, Prime, from Sumatra, the type of 

 which is in the Museum at Copenhagen. This species, however, is 

 a comparatively longer and squarer shell, quite distinct from the 

 Javanese specimens under discussion. The latter, judging from their 

 massive valves and clean condition, evidently come from a clear, 

 quicklj- flowing stream. I propose to give them the name of Corhicula 

 suhrostrata. 



