PHILALAJTKA. 15 



square or oblong; central teeth tricuspid, laterals multicuspid. 

 No mucous gland at the extremity of the foot. Generative 

 organs simple. No amatorial organ and no accessory organs." 

 TYPE, P. secessa, Godwin- Austen. 



Range. South India and Ceylon : Islands off the West Coast of 

 Sumatra. 



In describing the type species, Lt.-Col. Godwin-Austen alludes 

 to the interesting fact that this is the first record of the occurrence 

 in India of this group of shells. He further states that " nothing 

 like it has been found to the east of the Bay of Bengal, on the 

 North-east frontier, or in Burma, but the possibility of its being 

 a casual introduction is removed by the discovery of another allied 

 species in the south of the Indian Peninsula by Colonel Beddome." 

 Since the foregoing remarks were written two species have, how- 

 ever, been discovered in the Batu Islands oft' the West Coast of 

 Sumatra. They were subsequently described and figured in the 

 ' Mollusca of India/ part 10, where two other Cingalese species, 

 previouslv referred to Microcystis and Macrocldamys respectively 

 are included in Philalanka. 



24. Philalanka bilirata, Blanford. 



Helix bilirata, Blanford, .1. A. S. B. xxx, 1861, p. 352, pi. i, fig. 7. 

 Nanina (Sitala) bilirata, Tryon, Man. Conch, ser. 2, ii, 1886, p. 56. 

 Sitala bilirata, Godwin- Austen, Moll. India, i, 1882, p. 40. 



Ori'iinal description : *' Testa perforata, globosa, turbinata, 

 solidiuscula, cornea, transverse striata ; spira conoidea, apice 

 obtusula. Anfr. 7 angusti, sensim accrescentes ; superiores 

 carina una supramediana muniti, ultimus ad peripheriam acute 

 bicarinatus, subtus tumidus. Apertura subverticalis, angulato 

 lunaris, perist. rectum, marginibus distantibus, columellari brevi, 

 verticali. reflexo. 



" Diam. maj. 6, min. 5, axis 4| mm." 



Hab. India : Shevroy and Kolamullie Hills. 



Is stated to differ from P. mononema, Benson, in the rounded 

 base and less elevated spire. 



25. Philalanka subbilirata, Godwin-Austen. 



Sitala subbilirata (Nevill MS.), Godwin-Austen, Moll. India, i, 1882, 



p. 39, pi. 10, fig. 11 ; var. fig. 12. 

 Nanina (Sitala} subbilirat.a, Tryon, Man. Conch, ser. 2, ii, 1886, 



p. 56, pi. 25, fig. 28. 



Original description : " Shell depressly conoid, rather openly 

 perforate, covered with a strong epidermis ; sculpture, very fine 

 longitudinal ribbing, well seen on base, crossed by irregular lines 

 oF growth; colour dull ochraceous brown ; spire flatly conoid, apex 

 flat ; whorls 5, with a fine rib on the periphery of the last whorl, 

 with a single intermediate one above it, sides flat from the suture 

 to this, slightly convex above ; aperture ovate, subvertical ; 



