PHILALANKA. 17 



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

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

 sliglitly 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, Blnnfonl. 



Helix tn'cdrhiata, Blaiiford, .T. A. S. B. xxx, 1861, p. 355, pi. i, 

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



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

 pi. 10, tig. 10. 



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

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



Orif/itial description : — " Testa aperte perforata, depresso tur- 

 binata, tenuis, pallide cornea, oblique striatula, subtus obsolete 

 decussala, spira conoidea, apice planulata, perobtusa, sutura 

 impressa. Anfr. 4 couvexi, superne carinis duobus fililormibus 

 i-incti ; ultimus tribus medianis circumdatus, non descendens, 

 subtus rotundatus. Apertura snbverticalis, rotundato-lunaris ; 

 peristoma rectum, acutum, marginibus distantibus, sinistro nou 

 reflexo. 



" Diam. 1|, alt. 1 mm." 



Hah. India : Nilgiri Hills, Pykara (BJanford). 



A very small form, readily distinguishable by the median revolving 

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

 the periphery. 



29. Philalanka quinquelirata, Gude. 



Philalanka quinqnelirata, 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. — Philalanlri quinqucUrata. (From Proe. Malac. Soc. London.) 



deciduous cuticle ; finely and closely striated, the striae being 

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

 minute si)irals. Spire convex, apex obtuse, suture deep. Whorls 

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

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

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



o 



