I5<» DRiO. £. VON MOELLEN DOBPP OH [Feb. 20, 



Fam. HelicievE. 



11. Chloritis PLATYTRons, sp. nov. (Plate XVI. fig. 10.) 



T. sat aperte umbilicata, convexo-dejrressa, tenuis, transverse stria- 

 tula, punctis impresses in seriebus regularibus dispositis sculpta, 

 pilis brevissimis valde deeiduis obsita, opaca, pallide corneo- 

 brunnea; spira parum elevata, apice piano. Anfr. 4|, fere 

 plani, sutura inrpressa disjuncti ; tdtimus adperiplieriani carina 

 bene exserta, obtusa, lata ductus, basi convcxus, medio gibbus, 

 circa umbilicum infundibuliformem pervium compressus, sub- 

 cr istatus, ad aperturam breviter deflexus. Apertura fere dia- 

 gonalis, irregulariter cordiformis ; peristoma sat expansum, roseo- 

 lahiatum, basi rejlexiusculum, marginibus valde connive ntibns, 

 callo tenui junctis, columellari cum basali unguium obtusum 

 formante. 



Diam. maj. 20, edt. ll - 5 millim. 



Hab. prope vicum Chaya, in littore peninsula? malaccame insulis 

 Samui opposite 



Subsp. nov. SAMUIANA. — Minor, tenuior, spira ^>a«/?o magis 

 convexa, peristomate minus expanso, vix labiato. 



Diam. 16*5, alt. 9 millim. 



Hab. in insulis Samui. 



This fine form belongs to the group of keeled ChloriUs, for which 

 de Morgan has created the unnecessary subgenus Philidora (cf. 

 P. Z. S. 1891, p. 336), and is closely allied to C. gabata, Gld., 

 of Mergui and Tenasserioi. The type was found by Mr. Roebelen 

 near Chaya, a village on the Malay Peninsula just opposite the 

 Samui group within Siamese territory, the smaller vanety on our 

 islands. 



12. PUPISOMA ORCELLA, Stol. 



Pupisoma orcella, Stol. J. A. S. B. xlii. 1873, p. 33, t. ii. 

 fig. 2. 



The Samui examples differ from the Penang type merely in 

 their somewhat darker colour and slightly more elevated spire. 



That Pupisoma has nothing to do with Papa, but belongs to the 

 parentage of AcantJiinula and Zoogenetes (H. harpa, Say), I have 

 tried to prove elsewhere (Jahresber. Senckenb. nat. Ges. 1890, 

 p. 223). 



Fam. Bulimid^e. 



13. Amphidromus monilifertjs, Gld. 



Only one dead specimen was found, which seems to agree with 

 the above-named species described from Tavoy. 



Near Chaya Mr. Roebelen collected a fine variety of A. anna- 

 iiiiticns, Cr. et Fisch., with rose-coloured apex which I name var. 

 roseotincta. 



