LIST OF CRINOIDS OF THE CHICAGO AREA: 
Order I. LARVIFORMIA. 
Family PIsocRINID&. 
Pisocrinus benedictt, S. A. M.; P. gemmtformis, S. A-M.; P. quanquelobus, 
Bather. 7 
Family STEPHANOCRINIDA. 
Stephanocrinus obconicus, Slocom; S. osgoodensis, S. A. M.; S. sktjffe, 
Slocom. 
Family ZOPHOCRINID2. 
Zophocrinus howard1, 8. A. M.; Z. globosus, Slocom; Z. pyrtformis; 
Slocom. 
Family HETEROCRINIDA. 
M yelodactylus bridgeportensis, S. A. M. 
Order fh sFisTUiLaA TA: 
Family GASTEROCOMID. 
Achradocrinus patulus, Slocom. 
Family CYATHOCRINIDZ. 
Homocrinus ancilla, Hall; H. cylindricus, Hall. 
Cyathocrinus turbinatus, Weller; C. vanhornt, S. A. M. 
Botryocrinus polyxo, Hall. 
Amphertstocrinus dubtus, Weller. 
Family CROTALOCRINID. 
Crotalocrinus cora, Hall. - 
Order III. CAMERATA. 
Family PLATYCRINID. 
Platycrinus augusta, Slocom; P. dubius, Weller. 
Marsuptocrinus chicagoensis, Weller. 
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