138 Trans. Acad. Sci. of St. Louis 
HETEROSCHISMA 
Heteroschisma gracile WACHSMUTH. 
1886, Proceedings, Davenport Academy of Natural Science, vol. 
4, pp. 84-87. y 1-2. 
Hamilton Group; Alpena, Michigan. 
LOPHOBLASTUS 
Lophoblastus conoideus RowLey. 
1901, American Geologist, vol. 27, p. 345, pl. 28, figs. 1-4. 
Upper Chouteau limestone; Curryville, Pike County, Missouri. 
Lophoblastus marginulus Row ey. 
1901, American Geologist, vol. 27, p. 345, pl. 28, figs. 18-19. 
Lower Burlington limestone; Louisiana, Pike County, Missouri. 
Lophoblastus pentagonus RowLey. 
1905, American Geologist, vol. 35, p. 302, pl. 21, figs. 5-8. 
Chouteau limestone; Bowling Green, Pike County, Missouri. 
MESOBLASTUS 
Mesoblastus glaber (MEEK and WorTHEN), HAMBACH. 
1903, Transactions, St. Louis Academy of Science, vol. 13, p. 49. 
Mesoblastus glaber MEEK and WorTHEN, Butts. 
1917, Kentucky Geological Survey, Miss. formations of Western 
Kentucky, p. 62, pl. 15, figs. 27-31. 
Mesoblastus glaber MEEK and WorTHEN, WELLE 
1920, reg State Geological Survey, Bull. a p. 327, pl. 8, 
figs. 2 
of at Seton Shetlerville Formation, Renault Forma- 
tion; Cedar Bluff, Crittenden County, Kentucky, Hardin and 
Monroe Counties, I]linois. 
Mesoblastus glaber? ULricu. 
1905, U. . Dae diy Survey Prof. Paper No. 36, p. 57, p- 6, 
figs. 13- 
Ohara os of Ste. Genevieve limestone; Crooked Creek, 
n.-w. of Marion, Kentucky. 
Mesoblastus cf. glaber Butts. 
1926, Alabama Geological Survey, Special Report No. 14, p. 180, 
1. 59, fig. 3. 
> 
Gasper or Ste. Genevieve; Huntsville, Alabama. 
