578 TRANS. OF THE ACAD. OF SCIENCE. 
CYCLOPORA DISCOIDEA, NR. sp. 
marked, showing the basis of the chalices on the upper sur- 
face in connected lines and alternate series. irregu- 
lar, running into irregular frondescent expansions, which still 
— the concentric form of the banded sole. One spe- 
men is so deeply concave as to become infundibuliform ; 
psec only on one side, larger and not so long as in @. 
ngia. 
Geological position and Locality. — Keokuk Limestone, 
near Warsaw, III. Illinois State Collection, No. 9, 10, 11. 
CycLoProra FOLYMORPHEA, Il. Sp. 
Polyzoum a large encrusting expansion, with the ridges 
variously contorted without the appearance of a disk, al- 
though it seems to have had several centres of dovelypmeet 
alices larger than in the = former meee with the in 
terchalicular spaces more rugose ; chalices on both faces, with 
evidences here and there of a disposition in sap layers to su- 
perposition. The specimen from which this abecaiption is 
drawn is about four inches broad by as many long, and the 
whole expansion of the polyzoum seems to have been sev- 
eral times as broad as the space es by rent meae- 
urements. It is, we — evidently specifically different 
from the two preceding f orms. 
Geological position and Locality. —Chester Limestone, or 
3rd Archimedes Limestone, Pope County, Ill Illinois State 
poorer No. 12. 
| Crcrorona JAMESII, Nn. sp. 
Polyzoum a fragment showing mostly the sole with chali- 
__Zelroun tagment shoving mony parts ¢ of th — 
pas < formed of aor = less concentric —— ben 
+ times, by delicate strie or ; : 
vals oi tales. which appear like long septate parallel flattened 
the 
1 et origin of the chalices; 
rent sept 2 chalices 
intersections of the ridges and strie mostly at 1 Les 5 
ehalices or net-work of i apertures almost ee 
gular, somewhat more delicate and condensed whet” 
the preceding sy from which it is further ge 
: ar ees 
ons upon eat . the chalices a ane 
8g f chalices in a space of two 
