170 Trans. Acad. Sci. of St. Louis 
Pentremites pyriformis Say, BuTTs. 
1926, Geological mead of Alabama, Special Report No. 14, p. 
180, pl. 59, fig. 
Gasper oolite; Hak hi Alabama. 
Pentremites robustus Lyon. 
1860, Transactions, St. Louis Academy of Science, vol. 1, p. 629, 
pl. 20 a-c. 
Marly shale at top of third limestone of Millestone-grit beds; 
Grayson County, Kentucky. 
Pentremites robustus Lyon, Row ey. 
1903, Contributions to Indiana Paleontology, vol. 1, pt. 12, p. 
118, pl. 36, fig. 12. 
Kaskaskia; Newman’s Ridge, Tennessee. 
Pentremites reinwardtii Troost. 
1835, Transactions, Pennsylvania Geological Society, vol. 1, p. 
224, pl. 10, figs 10-11. 
Silurian; Tennessee. 
Pentremites reinwardtii Troost. 
1841, Fifth and Sixth Reports, Geology of Tennessee, pp. 58 and 
14. 
Silurian, Tennessee. 
Pentremites reinwardtii YANDELL and SHUMARD. 
1847, Contributions to the Geology of Kentucky, p. 6. 
Silurian, Tennessee. 
Pentremites reinwardtii YANDELL. 
1851, Proceedings, American Association for the Advancement of 
Science, p. Zaz: 
Pentremites roemeri SHUMARD. 
1855, The lst and 2nd Annual Reports of the Missouri Geological 
Survey, by G. C. Swallow, Jefferson City, pp. 186-187, pl. B, 
figs. 2 a, b, c 
Chemung group; Providence, Boone County, Missouri. 
Pentremites rusticus HAMBACH. 
1903, Transactions, St. Louis Academy of Science, vol. 13, pp. 
54-55, text fig. 15. 
Chester limestone; Washington County, Arkansas. 
Pentremites rusticus HAMBACH, MATHER. 
1916, Bulletin of the Scientific Laborato: of Denison Univer- 
sity, vol. 18, 1915-1916, pp. 101-102, ve 3, figs. 3-6. 
