Greger-Eublastoidea 147 
Pentremites angustus HamBAcH. 
1903, Transactions, ies Louis Academy of Science, vol. 13, pp. 
53- 4, text figs. 14 
Chester limestone; ‘Washington County, Arkansas. 
Pentremites angustus Hamspacu, MATHER. 
1916, Bulletin of the Scientific Laboratories " paeiegee en 
sity, vol. 18, 1915-1916, pp. 100-101, pl. 3 
— Formation, Brentwood limestone; Fayetteville a eae 
ood, Arkansas; Fort Gibson, Oklahom: 
Pentremites arctibrachiatus ULRiIcH. 
1917, Kentucky Geological Se Mi Formations of the Chester 
anes p. 2 , figs. 37- 
and Paint Cad phe Huntsville, Alabama; 
Floraville, Illinois. 
Pentremites arctibrachiatus huntsvillensis ULRicH. 
1917, Kentucky Geological Survey, Formations of the Chester 
Series, p. 248, pl. 2, figs. 41-42. 
Gasper; Huntsville, Alabama. 
Pentremites basilaris HamBAcu. 
1886, Transactions, St. Louis Academy of Science, vol. 4, pp. 
159-160, pl. B., fig. 9 
Kaskaskia limestone; Evansville, Chester, Illinois. 
Pentremites benedicti RowLey. 
1900, American Geologist, vol. 25, p. 69, pl. 2, figs. 29-32. 
Warsaw limestone; Grand Tower, Illinois; Wittenberg, Mis- 
souri. 
Pentremites biconvexus ULRICH. 
1917, Kentucky Geological Survey, Formations of the Chester 
Series, p. 247, pl. 2, figs. 34-36. 
Gasper oolite; Bowling Green, Kentucky. 
Pentremites biconvexus ULricn, Butts. 
1926, Geological Survey of Alabama, Special Report, No. 14, 
p. 180, pl. 59, fig. 2. 
Gasper oolite; Blount Springs, Alabama. 
Pentremites bipyramidalis Ha Lt. 
1858, Report on the Geological Survey of Iowa, vol. 1, pt. 2, p. 
607, pl. 15, fig. 2 
Keokuk ewes. Missouri. 
