PTEROCTCLrS. Ill 



chestnut lines ruiniing across the whorls, and with a band of the 

 same colour on the centre of the last whorl, purplish-brown 

 towards the apex. 



"Var. 1. The same without the medial line. 



" Var. 2. Ditto without the angular markings underneath. 



" Var. 3. The whole shell liorn-coloured." (Benson.) 



Diam. maj. 22, niin. 19, alt. 8 mm. 



Hah. India: Eajiuahalllange (AS'/oZiV-Z.-rt) ; Pareshnath (7?rt/;rtn) ; 

 Ganjam (Ball). 



Var. pui'iensis, NevUl. 



Pterocyclus rupestris, var. jniriensts, Nevill, Haud List, i, 1878, 

 p. 260 ; Kobelt & MiJlleudorfF, Nachr. Dents. Malak. Ges. xxix, 

 1897, p. 114 ; id., Cat. Pneum. 1899, p. 26; Kobelt, Das Tierreich, 

 Lief. 16, 1902, p. 169. 



" A d\\arf form with raised spire." (Nevill.) 

 Hah. India : Puri (liahan) ; Chandbally (Nevill). 



158. Pterocyclus spiramentum, Godwin- Austen. 



Pterocydosspiramentinn, Godwin-Austen, Rec. Iiid. Mus. viii, 1915, 

 p. 199, pi. 40, tig. 4. 



" Shell openly urabilicated, depressedly orbiculate, somewhat 

 globose. Sculpture, only fine epidermal lines of growth. Colour 

 dark sienna-brown, crossed by dark bands, running from the suture 

 to the narrow black periphery band. Spire slightly raised, very 

 depressedly conoid. Suture deep. Whorls 4, the last rapidly 

 increasing. Aperture circular, subvertical. Peristome slightly 

 reflected, not much thickened, the outer lip is expanded near the 

 suture, with sides turned in forming a spout-like projection. 

 Close behind this and adjacent to the suture is an apparent tube, 

 but it is rather of gutter form, semicircular in section, and is 

 given off from a cleft on the columellar side just within the aper- 

 ture, which is not an orifice — if it were so the gutter would be a 

 true tube and the shell a Spiraculum. It illustrates how the 

 sutural tube in that genus lias originated. This species is on the 

 borderland of the two genera PU'rori/clos and Spiracuhim. It must 

 be put in Pterocychs, because the tube is close to the aperture, 

 almost a part of the peristome. In Spiraculum the tube is 

 remote from the aperture. Operculum concave in centre, multi- 

 spiral, suture not raised. 



" Major diam. 15-0 ; alt. axis 4-75 mm."' (Godwin-Austen.) 



Hah. India: Abor Hills (Oakes). 



159. Pterocyclus troscheli, Benson. 



Pterocychs troscheli, Benson, A. M. X. If. ser. 2, viii, 1851, 

 p. 196, pi. 5, fipr. 2 : Pfeiffer, Zeits. Malak. viii, 1851, p. 13G ; id., 

 Cat, Pliaueropn. Brit. Mas, 1852, p. 27; id., Mou. Puoum. 



