1894.] LAND-SHELLS FJtOM THE SAMTTI ISLANDS. 149 



With all proper hesitation at introducing 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 

 Macrochlamys. Its nearest ally seems to be M. resplendens, Phil., 

 var. obesior, Mart. (Ostas. Laudschn. 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. limbata 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 istsularis, sp. nov. (Plate XVI. fig. 8.) 



T. semiobtecte et angustissime perforata, conico-turrita, subtiliter 

 striatula, lineis spiralibus valde confertis decussata, nitens, 

 corneo-hyalina. Anfr. 8, planulati ; ultimas ad perijpJieriam 

 acute carinatus, non desceadens. Apertura parum obliqua, 

 rotundato-securiformis ; peristoma rectum, acutum, margine 

 columellari superne reflexo. 



Diam. 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 subscclpta, sp. nov. (Plate XVI. fig. 9.) 



T. anyuste perforata, globoso-conica, tenuis, subtiliter et valde con- 

 fertim costulato-slriata, corneo-fusca ; spira couoidea, lateribus 

 convexis. Anfr. 6, convexi ; ultimus non desceadens, basi gla- 

 bratus, ad periplwiam obtuse angulatus. Apertura obliqua, 

 late lunarisj peristoma rectum, acutum, margine columellari 

 superne triangular iter reflexo. 

 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 

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

 spire and flatter whorls. 



9. Hemiglypta siamensis (Pfr.). 



Known from Siam and Tenasserim. The spire of the (Samui 

 form is generally more elevated. 



10. Abiophakta weinkaufeiana inflata, subsp. nov. 



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

 distinct angulation of the periphery and the more convex, almost 

 in Hated base of the last whorl. 



