114 CARELIA. 



from l 1 /^ to 5 mm. wide in shells about 35 mm. long. In 

 some shells the junction of the white band with the dark 

 color is a sharp line ; in others the dark color fades gradually 

 through red-brown; again, bright blue appears at the upper 

 edge of the darker color. The embryonic whorls and a young 

 shell in the Amastroid stage are shown in pi. 16, figs. 7 and 9. 



The following form seems to be a synonym. 



Var. suturalis Ancey. "The shell is like typical C. fuli- 

 ginea except that it is marked with more conspicuous super- 

 ficial spiral lines on the last whorl; upper part of the last 

 whorl margined broadly and diffusely with buff-white, and 

 sometimes encircled below the sutural zone with a few narrow 

 lines of the same color. Length 38, diam. 16.5, alt. aperture 

 18.5 mm. Kauai (Baldwin). In this variety the pale band 

 is not well defined as in C. bicolor Jay, which is usually con- 

 sidered a form of the same species." (Carelia fitliginea Pfr., 

 var. suturalis Ancey, Proc. Malac. Soc. London, vi, 122, 1904) . 



10a C. B. HYPERLEUCA n. var. PI. 20, figs. 5, 6. 



Upper (outer) surface of the last two or three whorls 

 white, with a very thin, pale yellowish cuticle ; base chocolate 

 or black, early whorls colored like bicolor. There are inter- 

 grading specimens connecting this with bicolor, such as pi. 

 20, fig. 5, and others connecting with adusta, pi. 20, fig. 7, 

 in which the upper surface of the last whorl is red-brown, 

 much lighter than the base. In fact, the color-forms of 

 C. bicolor probably have no existence as separate races. 

 Their status must be determined by the naturalist in the field. 



106. C. B. ADUSTA Gould. PI. 20, figs. 8, 9, 10. 



"Shell turrite, with pyramidal apex, imperf orate, solid, 

 blackish-brown, pale 'above. Whorls 7, convex, lightly striate, 

 the last subcarinate. Aperture oval, opaline within ; lip sim- 

 ple, acute, black; columella ivory-like, produced in a tooth 

 anteriorly. Length l 1 /^ diam. % inch." (Old.) 



Kauai: Haena. 



Achatiiia adusta OLD., Proc. Boston Soc. Nat. Hist, ii, 

 1845, p. 26. Acliatina fiiliginea PFR., P. Z. S. 1852, p. 66 



