1894.} L VXD-SHELLS FROM THE SAMUI ISLANDS. 149 



With all proper hesitation at iutrodiicing a new species of this 

 genus, the very numerous species of which certainly require some 

 weeding out, I cannot combine this form with any published 

 Macrochlami/s. Its nearest ally seems to be M. resplendens, Phil., 

 var. ohesior. Mart. (Ostas. Landschn. p. 72, t. xii. fig. 6), of 

 Siam, which has a slight callosity behind the peristome ; it is, 

 however, only visible in very adult specimens and but a thin 

 layer, whilst all my specimens of M. limhata show a distinct 

 inner lip, which is repeated several times in the interior of the 

 last whorl. Besides, the Samui form has a wider umbilicus, more 

 convex whorls, equal colouring above and below, and a somewhat 

 darker radial stripe. 



7. SiTALA ixsuLAEis, sp. nov. (Plate XVI. fig. 8.) 



T. semiobtecte et ancfustissime j^^^forata, conieo-turrita, suhtiUter 

 striatula, lineis spiralihus valde confertis decussata, nitens, 

 corneo-hyalina. Anfr. 8, i>lanulati ; idtimus ad peripheriam 

 acute carinatus, iion descendenn. Apertara paruni obliqua, 

 rotundato-securiformis ; peristoma rectum, acutum, manjine 

 columellari superne ri'Jle.ro. 



Uiam. 3" 75, alt. 4'75 millim. 



By the great number of whorls, the regular conical shape, and the 

 very narrow spiral sculpture this species is distinguished from all 

 forms of Sitala known to me. 



8. Kaliella subscflpta, sp. nov. (Plate XVI. fig. 9.) 



T. anyuste perforata, glohoso-conica, tenuis, suhtiliter et valde con- 

 fertim costulato-slriata, corneo-fusca ; spira conoidea, laterihus 

 convexis. Anfr. 6, convecci ; idtimus non descendens, hasi <jla- 

 hratus, ad periplieriam obtuse anxjulatus. Apertura obliqua, 

 late lanaris ; peristoma rectum, acutum, marrfiue columellari 

 superne triangulariter rejlexo. 

 Diam. 2*9, alt. 2*7 millim. 



The only Kaliella described from the Malay Peninsula is K. pe- 

 rakensis, G.-Aust., which shows a similar outline, but is more 

 distinctly carinate and only striated ; it also has much less convex 

 whorls. The sculpture of our species is similar to that of 

 A', sculpta, Mdff., of Macao, which has otherwise a much lower 

 spire and flatter whorls. 



9. Hemiglypta siameksis (Pfr,). 



Known from Siam and Tenasserim. The spire of the Samui 

 form is generally more elevated. 



10. Aeiophanta weinkatjefiana inflata, subsp. nov. 



This variety differs from the Cochin-China type in the less 

 distinct angulation of the periphery and the more convex, almost 

 inflated base of the last whorl. 



