DESCRIPTIONS OF SIX NEW LAND SHELLS FROM 

 THE MALAY PENINSULA. 



liY E. K. SYKES, B.A , E.L.S. 

 The following aie bare diagnoses ; it is proposed that figures shall 



follow later. 



Rhodina (?) mirabiiis, n. sp. 



Shell recalling in form Rho'lina pn-alci'iixi^, de Morgan, but the earlier 

 whorls increase more rapidly, and the lower half (jf the shell has a 

 more cylindrical appearance. The columella is twisted, and a revolv- 

 ing keel encircles the base and ascends spirally into the shell, about 

 half w'ay up the columella wall ; in addition, another keel is visible 

 from the junction of the suture line and the outer lip until, re\-olving 

 round the periphery, it fades out where it bisects the outer lip. 

 ^V'horls 13, earlier ones smooth, later ones strongly striate. 



Alt. 24.5 ; diam. max. 3.5 millim. 



Hah. — Kelantan, Malay Peninsula. 



Streptaxis eollin^ei, n. sp. , 

 Shell openly umbilicated, well depressed, costulated, the costal being 

 fine and regular, hyaline or yellowish white; whcjrls, 6^ — 7, somewhat 

 c )nvex, suture well marked, the last whorl being considerably distorted. 

 Aperture oblique, sub-quadrate, peristome expanded and reflected ; 

 parietal lamella oblique and curved, palatal teeth generally four, 

 sometimes only three, the uppermost and lowest being the largest. 



Alt. 5 ; diam. max. 9 millim. 



Hah. — Kelantan, Malay Peninsula. 



A well-depressed shell, which, in the form and position of the 

 tjeth, recalls S. siamemis, Pfr. 



Opisthostoma laidlawi, n. sp. 

 Shell ovate-conic, pale reddish horn-colour, apex obtuse : whorls 6-6^, 

 strongly convex, the lower ones being regularly, but finely and some- 

 what distantly, marked with lamellae. The last whorl is solute, 

 rounded, and lient backwards nearly to the suture of the fourth whorl. 



Alt. 2 ; diam. max. 2.5 ; diam. min. 1.5 millim. 



Hah. — Kelantan, Malay Peninsula. 



Recalls in form several of the Bornean species, but the apex is 

 much depressed, the shell is not so pyramidal, and the whorls very 

 conic. 



Clausilia (Pseudonenia) kelantanese, n. sp. 

 Shell elongately fusiform, dark chestnut brown, with ii-ii.\ whorls; 

 protoconch large, cylindrical, and smooth, the later whorls being 

 closely, finely striate, with traces of spiral sculpture crossing the striae ; 



