TLACOSTYLUS, FIJI IS. 99 



c. Ovate, the columella bearing a heavy callous lobe far 



within. paeteli, p. 102. 



c 1 . Ovate, columellar fold moderate ; olivaceous, with 



bluish-white aperture. graeffei, \). 104. 



c' 2 . Oblong, the columellar fold rather weak. 



garretti, p. 103. 



b l . Striped or spotted with green on a yellowish or pale ground, 

 the parietal callus normally thin and transparent. 



c. Columellar fold bearing a strong callous lobe in adults; 

 mouth pale; lip strongly reflexed. gracilis, p. 110. 

 c 1 . Columellar fold moderate ; lip expanded rather than 

 reflexed. 



d. Short and obese, the diam. more than half the 

 alt.; aperture very large with well expanded 

 orange lip. hoyti, p. 105. 



d\ Diam. about half the alt. or less. 



e. Cuticle yellowish maculate with green ; 

 lip but slightly expanded, usually orange 

 colored ; alt. about 58 mill. 



elobatus, p. 105. 



e 1 . Olivaceous, unmarked, the mouth bluish- 

 white, graeffei, p. 104. 

 e 1 . Shell more slender, smaller, with continu- 

 ous zigzag stripes; alt. 4149 mill. 



guanensis, p. 107. 



e 3 . Shell ovate, more or less maculate or de- 

 nuded of cuticle ; alt. 30-41 mill, pfeifferi, 

 p. 109 ; vitiensis, p. 110 ; ochrostoma, p. 108. 



a 2 . Shell thin, ovate, uniform white or with brown or olive variega- 

 tion ; lip broadly reflexed, white. 



b. Large, alt. 50-59 mill., roughly malleated, variegated. 



malleatus, p. 112. 

 b 1 . Smaller, alt. 44-50 mill., wrinkle-striate, white. 



ntorosiift. p. 113. 



Section Euplacostylus Crosse, 1875. 



Terrestrial species, with the shell solid, dull brown or denuded of 

 cuticle, oblong and more or less cylindrical, the columella with a 

 strong spiral trend ; 2 to 2^ apical whorls pitted when unworn. 

 Type P. secmanm. 



