Land- Shells of the Natuna Islands. 463 



26. Pupina Evansij GoiIwin-.Vuston. 



Pupino jFi-rt/ixi, Godwin- Austen, Proc. Zool. 8oc. 188P, ]). .'{-"51. pi. xxxix. 

 figs. 3, 3 a. 



I/ab. Sirhassen ; N. Borneo {Everett). 



The tyjie of this species was a dead shell from a cave- 

 deposit. Mr. Everett has since presented to tlie Museum a 

 living example from Bau, in N. Borneo ; this is of a dirty 

 pellucid appearance, with a pale peristome. The Sirhassen 

 shells are of a brownish colour, becoming reddish towards the 

 lip ; they agree in other respects. 



27. Diplomviatina rtthi'cunda, Martens. 



Diplommathia rubicunda, Martens, Preuss. Exped. Ost-Asien, Zool. 

 Bd. ii. p. 1G4, pi. iv. fig. 16. 



Hab. Sirhassen {Everett) • N. Borneo {Martens and 

 Everett) . 



The specimens from Sirhassen are of a bright red colour, 

 excepting the base of the body-whorl, which appears to be 

 coated with a thin luteous deposit. The umbilical region is 

 covered with a thin, smooth, and sliarply defined callus, a 

 feature not referred to by von Martens, but whicii is present 

 in Bornean examples also. 



28. Dij)lommatii)a adversa (H. & A. Adams), 

 var. initunensi's. 



Diplommatina adversa, PfeiH'er, Mon. Ilel. vol. iii. y>. oSii (Pa villus) ; 

 tied win -Austen, Proc. Zool. Soc. 188l>, p. 348, pi. xxxviii. fig. 3. 



I/ab. Bunguran and Sirhassen {Everett) ; Singapore 

 {Adayns) ; Sarawak, Busau {Everett). 



The specimens from the Natuna Islands are smaller than 

 the typical form of this species. They are mostly of a reddish 

 tint, with an orange-red aperture, which looks a trifle smaller 

 than in Bornean examples. The peristome is more rounded 

 above, where it is appressed to the whorl, but certain pellucid 

 lines seen through the transparency of the shell above the 

 aperture are similar in both forms. 



29. Diplommatina Strubelli. (PI. XVI. fig. 17.) 



Testa dextrorsa, ovata, superne acuminata, imperforata, succinca, ad 

 apiccm rufescens, tenuis ; anfractus 0, convexi, liris tenuissimis 

 obliquis ornati, superiores quatuor rcgulariter crescentes, penul- 

 timus maximus iutiatus, ultimus paulo angustior, antice leviter 

 asccndens ; apertura irregulariter rotundata vol auriformis ; 



