106 Trans. Acad. Sci. of St. Louis 
Pentremites potteri HAMBACH. 
1886, Sopeny St. Louis Academy of Science, vol. 4, p. 156, 
pl B, fi 
ee ‘Tikieatdne: Burlington, Iowa. 
Pentremites prematurus ULRICH. 
1917, Kentucky Geological Survey, Formations of the Chester 
Series, p. 245, pl. 2, fig. 20. 
Ohara limestone; Shaleiviile: Illinois. 
Pentremites princetonensis ULRICH. 
1917, Kentucky TS . Peed Formations of the Chester 
Series, p- 243, pl. 2, figs 
Fredonia oolite; Penoon eae ucky. 
Ohara limestone; Marion and Carraville, Beery 
Renault and Paint ere formations; {lkinoi 
Ste. Genevieve limestone; Missouri. 
Pentremites princetonensis ULricu, Butts. 
ee Kentucky Geological Survey, seeeeipiien Formations of 
stern Kentucky, p. 59, pl. 14, fig. 
F Be oolite; Breckenridge eae PS aiucky. 
Pentremites princetonensis vars. ULRIcH, Butts. 
1917, Kentucky Geological Survey, Belek Formations of 
Western Kentucky, p. 62, pl. 15, 26. 
Ohara limestone; ate and HMlinois, 
Pentremites princetonensis ULRICH, WELLER. 
1920, Illinois ye Geological Survey, Bulletin 41, pp. 314-316, 
pl. 4, figs. 1-7. 
St. bout ‘i oedoea to lower Chester; Illinois and Missouri. 
Pentremites princetonensis ULricu, Butts. 
1926, Geological Survey of Alabama, Special Report No. 14, p. 
181, pl. 59, fig. 32. 
Ste. Genevieve limestone; Huntsville, Alabama. 
Pentremites pulchellus ULRicu. 
1917, Kentucky gre ae Survey, Formations of the Chester 
Series, p. 242, pl. 2, figs. 1-7. 
i oolite; Princeton, Baker’s Station, Carrsville, Marion, 
Kentucky. Mont Sano limestone; Huntsville, Alabama. 
Paint Creek formation and Renault tmenones Southwestern 
Illinois. 
