31 LiGxiTic Stagk 31 



narrow band below; columella a little twisted, and flattened in the 

 lower part; aperture wide, a little more than half the k-n.^th of the 

 shell, pointed above and deeply notched at the base; a ver\- faint 

 revolving grove at the top of the anterior third of the bod}- 

 volution, marking the place of the very small tooth-like projedlion 

 on the outer lip; surface smooth, except a rather broad band near 

 the base of the last volution formed by the siphonal notch." 



" Piinoisions. — Length, -^4 inch, transverss diameter -'« inch.'' 



'" Loca/ilv. — \'icksburg. Miss." 



Aldrich (loc. cit. ) says: "The locality given by Whitfield is 

 no doubt incorrect. The .shell is described from a single .specimen. 

 An examination of the contents of the interior of the type .showed 

 a light colored sand exactly similar to that in my specimens col- 

 lected from Bell's landing, Alabama, on the Alabama river. The 

 type is a half grown form. 



Personally I have not been able to see Whitfield's Alabama 

 types, but I have no doubt Aldrich is right in the foregoing 

 statement. If so, then in all probability it is the form I have 

 figured, especially common at Yellew 'oluflf, that should be referred 

 to this species. This may be, and probably is the Lignitic repre- 

 sentative of Bnccinanop's al/ih . but for the present the two will be 

 kept separate. 



. Localities. — Ala.: Bell's landing? and Yellow bluff. 



Type. — Hall's collection. 



Specimen fii^urcd. — Paleont. Mus., Cornell Univ. 



Pseudoliva vetusta. I'l. :v fi.s^. "i- 



Sn-h. See Bull. Am. Pal., vol. i, p. 213. 



The Lignitic specimens are apt to have an enormous callosity 

 of the inner lip, especially posteriorly. The latter volutions are 

 kept out away from those just prece^ding by this callosity. In 

 the same way, Wilutilithes peirosu.'^ is distorted, forming an appar- 

 etitly distindl species called V. ttioiueyi. The great variation of 

 this species at different stages of growth and under di.ssimilar cir- 

 cum.stances has caused many names to be given as .specific, when 

 if given at all they should have been employed to designate the 

 varieties only. See our bulletin on the Lower Claiborne stage. 



