17 



rib above it at the angulation of the whorl, above the vertical 

 portion ; aperture ovately quadrate, very oblique ; peristome thin, 

 slightly thickened ; columellar margin vertical. 



" Major diam. 1*4. alt. axis 1-4 mm." 



Hab. Andaman Islands: South Andaman (Roepstorff). 



Differs from P. tricarinata in the pyramidal form and smaller, 

 narrower aperture. 



28. Philalanka tricarinata, Blanford. 



Helix tricarinata, Blanford, J. A. S. B. xxx, 1861, p. 355, pi. i, 

 fig. 10; Hanley & Theobald, Conch. Ind. 1875, pi. 129, tigs. 7, 10. 



Sitala tricarinata, Godwin-Austen, Moil. India, i, 1882, p. 39, 

 pi. 10, fig. 10. 



Nanina (Sitala) tricarinata, Tryon, Man. Conch, ser. 2, ii, 1886, 

 p. 55, pi. 25, fig. 25. 



Original description : " Testa aperte perforata, depresso tur- 

 1 inata, tenuis, pallide cornea, oblique striatula, subtus obsolete 

 decussaia, spira conoidea, apice planulata, perobtusa, sutura 

 i.npressa. Anfr. 4 convexi, superne carinis duobus fililormibus 

 rincti ; ultimus tribus medianis circumdatus, non descendens, 

 subtus rotundatus. Apertura subverticalis, rotundato-lunaris ; 

 peristorna rectum, acutum, marginibus distantibus, sinistro non 

 reflexo. 



"Diam. If, alt. 1 mm." 



Hab. India : Nilgiri Hills, Pykara (Blanford}. 



A very small form, readily distinguishable by the median revolving 

 lira being at the periphery, one being below and the other above 

 t he periphery. 



-9. Philalanka quinquelirata, Gude. 



Philalanka quinquelirata, Gude, Proc. Malac. Soc. London, xi, 1914, 

 p 51, text-figure. 



Original description. " Shell dextral, pyramidal, narrowly per- 

 forate, pale yellowish corneous, semi-translucent, covered with a 



Fig. 3. Philalanka quinquelirata. (From Proc. Malac. Soc. London.) 



<ifciduous cuticle; finely arid closely striated, the striae being 

 tlrxuous on the base, where there are also traces of excessively 

 minute spirals. Spire convex, apex obtuse, suture deep. Whorls 

 (>, tumid above, inflated below, increasing slowly and regularly, 

 with five fine spiral lirae, one at the periphery, the other four 

 between it and the suture ; the last whorl not descending in 



o 



