PLAKISPTBA. 165 



Austen, Proc. Malac. Soc. London, vi, 1904, p. 48, pi. 4 



(anatomy). 

 Planispira ( Trachia) vittata, Pilsbry, Man. Conch, ser. 2, ix, 1894, 



p. 115 (anatomy), p. 116, pi. 19, tig. 24 (shell). 

 Eurystoma vittata, Jousseaume, Me"m. Soc. Zool. France, vii, 1894, 



p. 286. 



Shell perforate, depressed-conoid, solid, whitish or yellowish 

 corneous, usually ornamented with various narrow and broad 

 yellow or brown bands, from 1 to 10 in number ; nepionic whorls 

 smooth, shining, pale fuscous or blackish brown, the remaining 

 whorls finely and irregularly striated, minutely granulated and 

 occasionally slightly wrinkled in places. Spire convex, suture 

 impressed, apex obtuse. Whorls 4|-5, subplanulate or convex 

 above, tumid below, increasing slowly and regularly, the last 

 suddenly dilated towards the mouth and deeply descending in 

 front. Aperture obovate, oblique, usually black or dark brown, 

 occasionally pale fuscous ; margins convergent, united by a 

 sinuous callus on the parietal wall ; peristome a little thickened, 

 rather widely expanded and reflexed, usually of the same colour 

 as the mouth, but sometimes edged with a paler colour, and 

 occasionally whitish or yellowish ; upper and outer margin 

 regularly curved, basal margin nearly straight, columellar margin 

 strongly dilated and reflexed, overhanging the umbilicus. 



Major diam. 22-28, minor 17'5-21-5, alt. 15-19 mm. 



Hob. India : Tranquebar, Coromandel (MorcJi) ; Trichinopoly 

 (Blanford) ; Malabar ; Travancore. Ceylon (Stoliczka, NevilT). 



A somewhat variable shell, especially as regards banding. A 

 single specimen in the Indian Museum labelled " Java " is 

 recorded by Nevill, but this record must be based either on a 

 wrongly identified shell or, which is far more likely, on an 

 accidental mixing of labels. 



Var. albina, Gmteloup. 



Helix vittata, var. albina, Grateloup, Act. Soc. Linn. Bordeaux, xi, 



1840, p. 401, pi. 1, fig. 19. 

 Helix vittata, var., PfeiiFer, Conch. -Cab., Helix, i, 1853, p. 330, 



pi. 58, fig. 17. 

 Helix {Eurystoma) vittata, var. spinolce (non Villa), Tryon, Man. 



Conch, ser. 2, iv, 1888, p. 120, pi. 33, fig. 61. 

 Planispira (Trachia) vittata, var. spinolce, Pilsbry, Man. Conch. 



ser. 2, ix, 1894, pi. 19, fig. 23. 



Differs from the typical form in being smaller, without bands, 

 and in the aperture being less dilated transversely. 



Major diam. 22, minor 16, alt. 15 mm. 



The shell figured by Tryon (copied from Conch. -Cab.), and the 

 one by Pilsbry as spinolce, do not agree with the description of 

 Helicc spinolcK by Villa, which differs simply from the type by its 

 smaller size and less numerous bands. 



