Tne Chouteau Group — Rowley. 115 
0. stelliformis , a well known lower Burlington form, has been 
reported from Sedalia, it may be a question of some doubt 
whether these “Placenta beds” are Kinderlxook or Burlington. 
Near Curryville they strongly remind one of the Devonian 
from their abundance of corals. 
It might not be improper here to state we have also found 
PorcelUa nodosa in the Lower Burlington at Louisiana, 
associated with Zaphrentis calceola, Z. elliptica , Granatocrinus 
melo and Spirifera grime si. P. nodosa was described by Messrs 
Meek and Worthen in the 3rd Ill. report as a Kinderhook 
species. 
Along the railroad cut, one mile north-east of Bowling 
Green, Mo., the “Placenta beds” are also to be seen, while we 
have noticed a great thickness of them four or five miles north¬ 
west of Yandalia, Audrain county, Mo., also six or seven miles 
north-west of Curryville, on Spencer creek. 
We subjoin a complete list of the fossils found at Louisiana 
in the Chouteau group, giving the specific names so far as we 
have been able to identify the forms. 
Many of the species are rare and a number of them yet un¬ 
described. 
It might not be improper to state the Orthis was long ago 
identified by Prof. Hall in the Iowa report as O. vanuxemi but, 
no doubt, is quite district from that species. 
Spirifera hannibalensis , Cyrtina acuiirostris and Athyris 
hannibalensis strongly resemble species in the Lower Burling¬ 
ton at Louisana but are doubtless specifically distinct. 
In the list the species found in the “Vermicular sandstone” 
are numbered 1. Those from the “Lithographic limestone” 2; 
from the underlying yellow and blue shales 3; and from the 
black shales 4. 
3 & 4 Pish bones and teeth. 
3 & 4 Coprolites. 
3 Phillipsia sp? (mere fragments.) 
2 Orthoceras (very rare.) 
1 Goniatite (have seen but one specimen.) 
1 Loxonema, like gasteropod (but one specimen.) 
2 XTndet. fragment of a gasteropod (one only.) 
3 Platyceras sp ? 
1 An Avicula-like lamellibranch. 
1 & 3 Allorisma hannibalensis. 
2 Aviculapecten? sp? (but one example.) 
