CONTENTS 
PAGE 
INTRODUCTION r 
Early Geologists i 
The Tennessee Area i 
The Indiana Area 6 
The New York Area 7 
The Foreign Silurian 8 
Origin of the work 9 
Collections used lo 
Acknowledgments ii 
Order CAAIERATA i2 
Family Dimerocrinidae I2 
Dimer ocrinus I2 
Eudhnerocrinus, new genus 14 
Cyphocrinus 14 
Gaaacrinics 15 
Lampfcrocrinus 19 
Genus and species indef 21 
Family Rhodocrinidae 22 
Paraga:sacrinus, new genus 22 
Paulocrinus, new genus 22 
Wilsonicfinus, new genus 23 
Eudimerocrinus, new genus 24 
Genus and species indet 24 
Lyriocrinus 24 
Family Melocrinidae 25 
Macro sty I ocrinus 25 
Melocrinus 27 
Cyt ocrinus 28 
Mariacrinus 28 
Allocrinus 30 
Patelliocrinus 31 
Genus and species indet 32 
Laurel ocrinus, new genus 32 
Clonocrinus - 34 
Family Calyptocrinidae 35 
Eucalyptocritius 35 
Callicrinus 39 
Family Batocrinidae ' 41 
Carpocrinus 42 
Desmidocrinus 43 
Cylicocrinus 43 
Periechocrinus 44 
Saccocrinus 45 
Aorocrinus 47 
Family Platycrinidae 48 
Lyonicrinus, new genus 48 
Myrtillocrinus 49 
Coccocrinus 51 
Culicocrinus 51 
Genus and species indet., No. i 51 
Genus and species indet.. No. 2 51 
Genus and species indet.. No. 3 52 
Hapalocrinus 52 
Brahniacrinus S3 
Nyctocrinus 5^ 
Mar sip ocrinus 55 
iii 
