150 i»K. O. t\ VON MOELLENDOEiT ON [Feb. 20, 



Fam. HELiciDiE. 



11. Chloritis platttkopis, sp. iiov. (Plate XVI. fig. 10.) 



T. sat aperte umhilicata, convexo-depressa, tenuis, transverse stria- 

 tula, punctis impressis in seriebus regularih%is disposltis scMlpta, 

 pilis hrevissimis valde deciduis ohsita, opaca, pallide corneo- 

 hrunnea ; spira parum ehvata, apice piano. Anfr. 4^, fere 

 plani, sutura impressa disjuncti ; ultimus ad peripTieriam carina 

 bene exserta, obtusa, lata cinctus, basi convexus, medio gibbus, 

 circa umbilicum infundibuliformem pervium compi-essus, sub- 

 cristatus, ad apjerturam breviter deflexus. Apertura fere dia- 

 gonalis, irregulariter coi'diformis ; peristoma sat expansum, roseo- 

 labiatum, basi rejlexiusculum, marginibus valde conniventibus, 

 callo tenui junctis, columellari cum basali angulmn obtusum 

 fomiaoite. 



Diam. onaj. 20, alt. 11-5 millim. 



Hab. prope vicum Cliaya, in littore peninsulae malaccanae insulis, 

 Samui opposito. 



Subsp. nov. SAMTJiANA. — Minor, tenuior, spira paullo 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 CTilorites, 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 Tenasserim. The type was found by Mr. Eoebelen 

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

 Samui group within Siamese territory, the smaller variety 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 dariter colour and slightly more elevated spire. 



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

 parentage of Acanthinula and Zoogenetes (H. Tiarpa, Say), I have 

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

 p. 223). 



Fam. BuLiMiDiE. 



13. Amphidromus monilifeeus, 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- 

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

 roseotincta. 



