160 HELICIDjE. 



Icon, vii, 1852, pi. 84, fig. 450 j Pfeiffer, Conch .-Cab., Helix, ii, 



1853, p. 92, pi. 82, figs. 15-17 ; Hanley & Theobald, Conch. Ind. 



1870, pi. 55, figs. 6, 7. 

 Helix (Trachia) nilagirwa, von Martens, Die Heliceen, ed. 2, 1860, 



p. 160. 



Helix (Planispira) nilagirica, Nevill, Hand List, i, 1878, p. 77. 

 Helix (Plectotropis {Trachia]} nilagherica, Try on, Man. Conch. 



ser. 2, iv, 1888, p. 65, pi. 14, figs. 70, 71. 

 Planispira (Trachia} nilagirica, Pilsbry, Man. Conch, ser. 2, ix, 



1894, p. 116. 



Original description : " T. late umbilicata, depressa, discoidea, 

 striata, corneo-albida, linea rufa supra peripheriam cincta ; spira 

 planiuscula ; anfr. 5 convexiusculi, lente accrescentes, ultimus 

 antice abrupte deflexus ; umbilicus latissimus, anfractum penulti- 

 mum late monstrans, medio angustus, pervius ; apertura parva, 

 horizontalis, rotundato-ovalis ; perist. continuum, album, sub- 

 labiatum, reflexum." (Pfeiffer.) 



Diam. maj. 10-75-14-5, min. 8-75-12, alt. 3-5-5-5 mill. 



Hob. India : Nilgiries (Blanford) ; Trichinopoly (Blanford). 



A distinct and well marked species, the convolute character of 

 the underside of the shell strongly resembling many of the North- 

 American species of Polygyra, such as P. cereolus. The supra- 

 peripheral band mentioned in the original diagnosis is frequently 

 absent, and many specimens instead have the latter portion of the 

 last whorl dark fulvous, while others again exhibit transverse, 

 alternately light and dark bands, or they may be uniformly pale 

 ochraceous. The shell is densely, minutely granulated under 

 the deciduous cuticle, which, when fresh, bears very short, stiff, 

 densely crowded hairs, neither of which fact is referred to in the 

 diagnosis. 



131. Planispira nagporensis, Pfeiffer. 



Helix naaporensis, Pfeiffer, P. Z. S. 1860, p. 135 ; Malak. ibid., 



Blatt. vii (1860), 1861, p. 235. 

 Helix (Patula (Patulasira}) nayporensis, Pfeiffer & Clessin, Nomencl. 



Helic. Viv. 1881, p. 90. 



Original description : " T. latissime umbilicata, depressa, 

 tenuiuscula, oblique striata, opaca, carneo-albida ; spira medio vix 



Fig. 79. Planispira nagger ensis. 



proniinula ; anfr. 4 vix convexiusculi, ultimus subtus vix latior, 

 antice deflexus et subtus subconstrictus ; apertura perobliqua, 



