178 COCHLOSTYLA-COCHLODRYAS. 



H.florida Sows., P. Z. S. 1840, p. 87. REEVE, Conch. Syst. ii, 

 t. 163, f. 2; Conch. Icon., f. 43. PPB., Mon. i, p. 222; Conchyl. 

 Cab., p. 295, t. 50, f. 1, 2.Bulimu8 helicoides PFR., Zeitschr. f. 

 Mai. 1849, p. 176 ; Conch. Cab., Bui., t. 36, f. 7, 8. RVE., Conch. 

 Icon., f. 72. 



A brilliant green shell, having the ground-color less streaked and 

 the sutural white band narrower than C. polychroa. The green is 

 sometimes changed to olive. 



C. POLYCHROA Sowerby. PL 38, figs. 74, 75, 76, 77, 78. 



Imperforate, globose or globose-elongated, rather thin ; conspicu- 

 ously obliquely streaked with grass-green and whitish, having a wide 

 white (rarely red) band at the suture, and frequently banded with 

 brown. 



Surface smooth, lightly obliquely striatulate, the earlier whorls 

 having microscopic spiral stride when not worn. Whorls nearly 6, 

 convex ; apex obtuse. Aperture white within, oblique. Peristome 

 rather narrowly reflexed, white ; columella vertical, nearly straight, 

 perceptibly truncated at its base. 



Alt. 43, diam. 31 mill. 



Alt. 43, diam. 34 mill. 



Alt. 33, diam. 29 mill, (shortest specimen). 



Alt. 39, diam. 29 mill, (most elongated specimen). 



Island of Temple, near Burias, Philippines. 



H. polychroa Sows., P. Z. S. 1840, p. 87. PFR., Monogr. i, p. 

 221 ; Conchyl. Cab. p. 295, t. 50, f. 13-15. RVE., Conch. Icon. f. 

 44. DH. in Fer. Hist. t. 104 A, 1-4 ; 110 A; f. 3-6. H. galactites 

 var. picturata GRAT., Actes Bord. xi, p. 163. ? Helicostyla smarag- 

 dus BECK, Index p. 37 (no desc.). Bulimus virido-striatus LEA, 

 Trans. Amer. Philos. Soc. 1841, p. 455, t. 11, f. 2. Cochlostyla 

 (Cochlodryas^) polychroa SEMPER, Reis. Landmoll. p. 199. 



The sutural band is wider than that of C. fiorida, the shell is 

 thinner, and the columella more distinctly truncated at its base. 



The color-forms of this beautiful species are numerous, the princi- 

 pal patterns being these : 



(1.) Green and white streaked, bandless except for a wide sutural 

 white zone (fig. 76). 



(2.) The same, but sutural zone red, a brown patch around the 

 columella. 



