I06 ILLINOIS ACADEMY OF SCIENCE. 



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Cladopora palmata, Hall and Whitfield * 



Craspedophyllum archiaci, Billings * * * 



Cyathophyllum sp 



Cystiphyllum cf. americanum, Edwards and Haime * * * * * 



Favosites alpenensis, Winchell * * * 



Favosites placenta, Rominger * * 



Heliophyllum Italli, Edwards and Haime * * * 



Phillipsastrea bilUngsi, Calvin * 



Streptelasma rectum, Hall * 



Streptelasma simplex. Hall * 



Striatopora rugosa, Hall * 



Zaphrentis gigantea, Lesueur * 



Zaphreniis sp 



Spirorbis angulatus, Hall * 



Cyclotrypa collina, Ulrich * * 



Cyclotrypa cotnmunis, Ulrich * 



Cystodictya hayniltonensis, Ulrich * * * 



Eridotrypa appressa, Ulrich * * 



Euspilopora barrisi, Ulrich * 



Fenestella vera, Ulrich * * 



Fenestrapora occidentalis, Ulrich * 



Fistulipora stricta, Ulrich * 



Fistiilipora vionticulata. Ulrich * * 



Hederella filiformis. Billings * * 



Hemitrypa tenera, Ulrich * 



Meekopora stellifera, Rominger * * 



Orbignyella monticula. White * * 



Orbignyella tenera, Cleland * 



Petalotrypa compressa, Ulrich * * 



Reteporina hamiltonensis, Ulrich *. * * 



Rhombopora subannulata, Ulrich * 



Rhombopora sulcifera. Ulrich * 



Semicoscinium rhombicum, Ulrich * * 



Ambocoelia umbonata, Conrad * * 



Athyris fultoneusis, Swallow * * * * * 



Atrypa hystrix, Hall * * * * * 



Atrypa aspera occidentalis, Hall * 



Atrypa reticularis, Linnaeus * * * * * 



Atrypa spinosa, Hall * * * * 



Chonetes scitulus, Hall * * * 



Crancena iowensis Calvin * 



Crancena romingeri. Hall * * 



Crania sheldoni. White * * ^ 



Cyrtina hamiltonensis. Hall * 



Cyrtina hamiltonensis recta, Hall * * * 



Cyrtina umbonata. Hall * 



Gypidula comis, Owen * 



Lingulodiscina marginalis, Whitfield 



Nucleospira concinna. Hall * 



Nucleospira ventricosa. Hall 



Orhiculoidea telleri, Cleland ^ 



Orbiculoidea zvardi, Cleland 



Pentamerella dubia. Hall ^ ^ 



Pholidostrophia iowensis, Owen ^ 



Productella subalata. Hall * 



Pugnax sp ^ ^ ^ 



Reticularia Umbriata, Conrad 



Reticularia subundifera, Meek and Worthen * ^ 



Rhipidomella vanuxemi, Hall 



Rcemerella grandis, Vanuxem ^ ^ ^ 



Schizophoria striatula, Schlotheim 



Schuchertella chemungensis, Conrad 



