PALAEOZOIC PUPLLLID^;. 317 



Anthracopupa( ?) dunkardiana Stauffer & Schroyer, Geol. 

 Surv. of Ohio, 4th Ser., Bull. 22, 1920, p. 144, pi. 11, f. 12-16. 

 Permian, Dimkard Group : base of the Lower Washington 

 limestone, half mile south of Pleasant Grove, Belmont Co., 

 Ohio. 



MATURIPUPA new genus. 



Ovate, Tornatelliniform shells having shortly ovate aperture 

 with thin, slightly expanded outer and reflected columellar 

 margins, their insertions distant. Parietal margin decidedly 

 oblique. A long, median parietal lamella and an entering 

 columellar lamella present. Type M. vermilionensis (Brad- 

 ley), pi. 32, figs. 17, 18. 



Maturipupa vermilionensis (Bradley). Pupa vermilio- 

 nensis Bradley, Amer. Journ. of Sci. (3), IV, 1872, p. 87, f. 

 1, 2.— Dawson, Amer. Journ. of Sci. (3), XX, p. 410, f. 7, 8, 

 9, 14c. Pennsylvanian : concretionary limestone of underclay 

 of Coal No. 6, Wabash Valley Section, at Pelly's Fort, Ver- 

 milion River, Illinois. 



This small, densely microscopically striate shell, 3.6 mm. 

 long, has more resemblance to the Tornatellinidae or to some 

 Auriculidas than to any Pupillidse, and it probably does not 

 belong to the latter family. 



DENDROPUPA Owen. 



Dendropupa Owen, Palaeontology, or a systematic summary 

 of extinct animals and their geological relations, 1860, p. 79 

 (species alluded to but not mentioned by name). — Dawson, 

 Amer. Journ. Sci. (3), XX, 1880, p. 408, for P. vetusta. 



The shell is shaped like Microceramus, subcylindric below, 

 tapering in the upper half, of rather numerous whorls (9 in 

 the type-species), the initial whorl smooth, the next marked 

 with rows of little pits which gradually pass into continuous 

 stria? (fig. 21, X 16) ; subsequent whorls closely ribbed axially. 

 Aperture toothless, the peristome slightly reflected with widely 

 separated insertions. 



Type Pupa vetusta Dawson. PI. 32, figs. 21-24. 



