238 PROCKEDINGS OF THE MALACOLOGICAL SOCIETY. 



Mlldff. (Nachriclitsbl. D. Mai. Gosellsch., 1897, p. 91), accordiug to 

 description should come nearest in this respect, but my specimens, 

 formerly examined by v. M Ollendorff, as well as one I received for 

 comparison from the Museum of Berlin, are larger and moie depressed. 

 It differs moreover by the larger number of keels, a less 

 ()bli(|iie, more circular aperture, a narrower umbilicus, and hy colour. 

 L. oh/iqui.'itridtiis, IJullm (Proc. Mai. Soc. Lond., vol vi, p. 110, 

 pi. vi, figs. 4, 5), which is also a rather high shell, has a mucli 

 laj'ger (sixteen to eighteen) number of spiral lirae ; in Z. trochidns, 

 V. ^fartens (Ostas. Landschu., p. 141), on the contrary, it is con- 

 siderably smaller. 



27. Nerita lineata, Chemnitz. 



Chemnitz, Conoh. Cab., vol. v, p. 297, pi. cxci, figs. 1958. 1959; 

 lieeve, Conch. Icon., vol. ix, Neritn, fig. 13 ; v. Martens, ^lartini- 

 Chemn., Conch. Cab., 2nd ed., Nerita, p. 15, pi. i, figs. 3, 4; 

 pi. iv, figs. 12-15. 

 Hah. — Tjilatjap, March, 1911. Two specimens. 

 This is tlie only marine species. The specimens are quite typical. 

 Native name Susuk daun. 



28. JSTeritina (Cmtuon) brevispina, Lamarck. 

 Lamarck, Anim. sans Vert., 2n(i ed., vol. viii, p. 572 ; Mousson, 

 Laud- u. Siissw. Moll, von Java, pp. 83, 118. pi. xii, fig. 12; 

 pi. XX, fig. 11; pi. xxii, figs. (5, 7 {Corona aastrtilis) ; Keeve, 

 Conch. Icon., vol. ix, Neritma, fig. 28 ; v. Martens, Martini- 

 Chemn. Conch. Cab., 2nded., Neritma, p. 156, pi. xvii, figs. 1-4, 9; 

 id., Siiss.- u. Brackw. Moll, des Ind. Archipels, p. 79. 

 Hab. — Small river, jS^usa Kambangan, ^larch, 1911. Twenty-two 

 specimens. 



Rather snudl and variable in colour, but quite typical. Native 

 name Keong batu. 



29. Septakia suiiORBicuLARis, Sowerby. 

 Sowerby, Cat. Tankerville, p. 10; v. Martens, Martiui-Cheiun. Conch. 

 Cab., 2nd ed., Navicella, p. 31, pi. vi, figs. 5-8, 14 ; id., Siiss.- u. 

 lirackw. Moll. des. Ind. Archipels, p. 84. 

 Ilah. — Nusa Kambangan, March, 1911. Six specimens. 

 The specimens are marked with oblong lighter spots near the 

 nun-gin ; some specimens come near to the ?,\xb-\-dY\e\.j furcato-rad iata, 

 V. ^lartens, but they still belong to the type. 



30. CoRBicuLA DUCALis, Prime. 

 Prime, Proc. Boston Soc. Nat. Hist., vol. viii, p. 274, 1862; Philippi, 

 Abbild. neuer Conch., vol, ii, p. 76, Cyrena, pi. i, fig. 3 (flioninea) : 

 ^lousson. Land- u. Siissw. Moll, von Java, p. 87, ])1. xv, tig. 3 

 {flu)ni7iea) ; Clessin, Maitini-Chemn. Conch. Cab., 2nd ed., 

 Cycladeen, p. 184, pi. xxxii, figs. 5—6; v. Martens, Siiss.- u. 

 Brackw. Moll, des Ind. Arehipels, p. 114. 

 Ilab. — TuTitang Piiver, October, 1910. Nine specimens. 



