CARELIA. 115 



;i854); Monogr. iii, 490; Conchyl. Cab. p. 367, pi. 43, f. 

 21, 22. Achatina bicolor Jay, PFR., Conchyl. Cab. p. 335, 

 pi. 39, f. 6, 7. DESHAYES in Fer., Histoire, p. 188, pi. 122, 

 f. 4, 5. REEVE, Icon, v, pi. 1, f . 4. Carelia bicolor Jay, 

 BINNEY, Proc. A. N. S. Phila. 1876, p. 185, pi. 6, and Ann. 

 N. Y. Acad. Sci. iii, p. 103, pi. 6, f. I (dentition), pi. 16, fig. 

 D (jaw). 



This form differs from C. bicolor only in the absence of 

 a white zone below the suture. The last one or two whorls 

 are chocolate or black, the spire red-brown, and the embryonic 

 whorls dark again above the suture. Often the red-brown 

 of the spire extends upon the upper half of the last whorl, 

 the basal half remaining black. Mr. C. M. Cooke found 

 adusta living with true bicolor at Haena. All the figures 

 published as bicolor represent adusta, except Jay's original 

 illustration and Borcherding 's figures. 



lOc. C. B. FULIGINEA Pfeiffer. PI. 21, figs. 9, 10. 



"Shell ovate-turrite, solid, roughly striate, glossy, sooty- 

 black ; spire turrite the apex acute. Whorls 6y 2 , convex, the 

 last about two-fifths the length, very obsoletely angular be- 

 low the middle columella arcuate, vertically truncate at the 

 base. Aperture slightly oblique, subrhombric-oval ; peristome 

 simple, acute. Alt. 36, diam. 16 mm." (Pfr.) . 



Pfeffer's original figures are copied. Borcherding con- 

 siders this form specifically distinct from adusta on account 

 of its color, which is black with no visible indication of 

 brown, and its luster, fuliginea being glossy when the cuticle 

 is preserved, while bicolor and adusta are dull. Pfeiffer's 

 original figures show brown upper whorls. In the series be- 

 fore me I cannot trace such a difference in luster between 

 the forms as Borcherding claims. In fact, I am much dis- 

 posed to rank fuliginea as a synonym of adusta. References 

 are given under adusta. 



Borcherding has described several supposed varieties of 

 adusta as follows: 



