ART. 5 LUZON" LAND SHELLS BAETSCH 11 



1S58. Helicostyla mirahilis H. aud A. Adams, Gen. Rec. MoL, vol. 2, p. 192. 



1859. Helix tmrabilis Pfeiffer, Mon. Helic. vivent., vol. 4, p. 206, in part. 



1860. Helicostyla mirabilis Martens, Albers, Heliceen, ed. 2, p. 175. 



1867. Cochlostyla miraWUs Martens, Preus. Exp. Ost. Asiat. Zool., p. 89, in part. 



1868. Helix mirabilis Pfbtiffer, Mon. Helie. vivent., vol. 5, p. 274, in part. 

 1870. Cochlostyla mirabilis SEMPEas, Reis. Phil., pt. 2, vol. 3, p. 192, in part. 

 1876. Helix nvirabilis Pfeiffer, Mon. Helic. vivent., vol. 7, p. 318, in part. 



1880. Cochlostyla mirabilis Kobelt, 111. Conchyl., vol. 2, p. 256, pi. 78, fig. 5. 



1881. Cochlostyla mirabilis Pfeiffes, Clessin Nomenclator, p. 205. 

 1887. Cochlostyla mirabilis Hidalgo, Journ. Conchyl., vol. 35, p. 144. 



1891. Cochlostyla mirabilis Pilsbry, Tryon Man. Conch., ser. 2, vol. 7, pp. 



181-3, pi. 57, figs. 83, 86. 

 1894. Helicostyla mirabilis Pilsbry, Man. Conch., ser. 2, vol. 9, p. 224. 

 1898. Cochlostyla mirabilis Mollendorff, Abhand. Naturf. Ges. Gorlitz, vol. 



22, p. 113, in part. 

 1901. Cochlostyla mirabilis Hidalgo, Obras Malac, p. 441, in part, pi. 49, figs. 



1, 2, 8, 5. 

 1905. Cochlostyla mirabilis Mollendorff, Kobelt and Winter, Semper Reis. 



Arch. Philip., vol. 10, pt. 7, pp. 151-3. 



Cochlostyla mirahilis Ferussac as figured by him is represented by 

 our Figures 5-7 on Plate 4. This shell is white excepting the last 

 half of the last turn which is pale yellow. The shell has a dark 

 brown peripheral zone, a little paler narrower one at the summit and 

 an intermediate one halfway between these. There is no definite 

 dark area about the umbilicus, but the general coloration is of a 

 little darker shade here. Some shells, like our Figures 8-10, Plate 

 4, lack all color bands. Figures 1-3, Plate 5, show a form in which 

 a broad brown umbilical area with secondary bands is present, also 

 a superipheral band within the aperture, while the band between the 

 summit and periphery is absent. An extreme form of coloration is 

 shown in Figures 4-6, Plate 5, where the spiral bands of brown 

 become much expanded and completely cov^ the base. 



This subspecies, represented by many specimens in our collection, 

 comes from Albay Province, Luzon. 



The specimen figured on Plate 4, Figures 5-7, representing Ferus- 

 sac's figure, has 5 whorls and measures-height, 35.5 mm.; greater 

 diameter, 31.1 mm. ; lesser diameter, 26.1 mm. 



It differs from Goehlostyta inirahilis trichroa Pilsbry by having 

 the dark bands practically of the same shade of brown instead of 

 light and dark spiral bands. 



COCHLOSTYLA MIRABILIS TRICHROA Pilsbry 



Plate 5, Figures 7-9 



1851. Helix mirabilis Reeve, Conch. Icon., pi. 2, fig. 45c. 



3851. Helix mirabilis Deshayes, Fer. Hist. Nat. Mol., vol. 1, pp. 319-20, pi. 



108c, figs. 3^. 

 1853. Helix mirabilis Pfeiffer, Mon. Helic. vivent., vol. 3, p. 172, in part. 

 1859. Helix mirabilis Pfeiffer, Mon. Helic. vivent,, vol. 4, p. 206, in part. 



