MACRODONTES. 35 



A specimen from Cubatad, Sao Paulo (pi. 13, fig. 97), differs trom 

 the type in being darker colored, of a dark reddish-chestnut hue, 

 somewhat more solid, with the denticles on the outer lip and colu- 

 mellar margin subobsolete, hardly noticeable, and of the reddish color 

 of the lip itself; the pits behind the lip are correspondingly obsolete, 

 but there are two minute white denticles on the columellar ibid. This 

 shell measures: alt. 26, diam. 10 mill. ; length of aperture 11, width 

 61 mill. 



M. DEGKNERATUS Pilsbry. PI. 13, figs. 98, 99. 



Shell oblong-turreted, perforate and rimate, thin but moderately 

 strong, pale yelhwish- green. Surface hardly shining, striated in the 

 direction of growth-lines, the strix hardly visible without the aid of 

 a lens, under which they are seen to be thread-like, well raised, 

 finely but rather superficially cut into beads by decussating spirals 

 which crentilate the summits of the striae. Spire convexly conic, 

 the apex obtuse ; whorls 5 j, quite convex, the earlier 1J densely 

 striated spirally, the last whorl becoming free and somewhat de- 

 scending in front, constricted and showing 3 small pits behind the. 

 outer lip, bicarinate at base, the keels short, outer one strongly 

 pinched up, the inner low, rounded, a distinct depression between 

 them. Aperture oblique, squarish-oblong, nearly one-third the total 

 length of the shell, obstructed by a strong columellar fold which 

 bears a transverse lamella below, and by 6 small, tuberculiforrn sub- 

 obsolete teeth: one upon the parietal margin close to its posterior 

 termination, three upon the outer lip, the uppermost (suprapalatal) 

 quite small, and with the parietal denticle, defining a small rounded 

 posterior sinus or notch, the upper and lower palatal folds low, 

 removed from the lip-edge ; basal fold median; a small subcolumellar 

 tooth below the transverse columellar lamella. Peristome white, 

 narrowly reflexed, continuous and free throughout. Alt. 21^, 

 greatest diam. 8J, length of aperture 7 mill. 



Brazil: Palmelras, Province of Parana, (Dr. H. von Ihering). 



0. (Macrodontes] degeneratus PILS., Proc. Acad. Nat. Sci., Phila., 

 1898, p. 473 (Jan. 13, 1899). 



Very unlike other known species in the pale green color and 

 short aperture with degenerate teeth. 



