80 Ech, 
ECHINODERMATA. 
Family 18. Dendrocriniclce : Dendrocrinu s, Ottawacrinus. 
Family 19. Eupachycrinidcc : Aesiocrinus, Delocrinus , Eupachy- 
crinus , Ulocrinus. 
Family 20. Erisocrinidcc : Erisocrinus , Menocrinus i Stemmato - 
crinus. 
Family 21. Agassizocrinidai : Agassizocrinus. 
Family 22. Aferocrinidce : Merocrinus. 
H. Genera having five basals, five subradials, regular interradials : — 
Family 23. Gaurocrinidce : Gaurocrinus } Reteocrinus. 
Family 24. Rhodocrinidcc : Archceocrinus, Goniasteroidocrinus, 
Lyriocrinus , Rhapanocrinus , Rhodocrinus. 
Family 25. Glyptcisteridce : Glyjdaster, Lampterocrinus, Thysano- 
crinus. 
I, Genera having five basals, no subradials, regular interradials 
Family 26. Glyptocrinidce : Cupulocrinas, Glyptocrinus ) Pycno- 
crinus, Schizocrinus , Siphono crinus. 
Family 27. Cleiocvinhlai : Cleiocrinus. 
K. Genera having five basals, no subradials, no regular interradials : — 
Family 28. Iieterocrinidce : Ectenocrinus , Ileterocrinus , Iocrinus , 
Ohiocrinus. 
Family 29. Anomalocrinklce : Anomalocrinus. 
Family 30. Belemnocrinidco : Belemnocrinus. 
Family 31. Catillocrinidce : Catillocrinus. 
Family 32. Ilylocrinidai : Hybocrimis. 
Family 33. Haplocrmidce : Allagecrinus , Haplocrinus. 
Family 34. Pisocrinidcu : Pisocrinus. 
Family 35. Edriocrinidce : Edriocrinus. 
Of uncertain family : Myrtillocrinus , Nipterocrinus , Camaro - 
crinus , Ancyrocrinus , Aspidocrinus , Brachiocrinus , 
Coronocrinus , Cystocrinus, Pachycrinus. 
Crinoidea of the Trenton Formation ; Ami, (1) p. 57 : in the Keokuk 
Beds at Keokuk, Iowa ; Gordon (2). 
' Abrotocrinus, n. g., pp. 30 & 31, for A. cymosus, n. sp., Keokuk Group, 
Indiana ; Miller & Gurley, pp. 31 & 32, pi. v, fig. 2. 
f Actinocrinus, sp. ? from Burlington Limestone ; Rowley (2). 
f ; A. grandis , Keokuk Group, Indiana, Miller & Gurley, pp. 25 & 
26, pi. v, fig. 1, & pi. vi, fig. 1 ; A. nodosus , Lower Carboniferous, Mis- 
souri, Miller, (1) pp. 33 & 34, pi. v, fig. 7 ; A. puteatus , Lower Bur- 
lington Limestone, Louisiana, Rowley (3) & Hare, pp. 101 & 102, pi. ii, 
fig. 16 : n. spp. 
Actinometra trichoptera , Mull., sp., Port Phillip ; Carpenter, (4) 
p. 135. 
A. gracilis , Pulo Edam, A. monobrachius , China Sea, Hartlaub, pp. 
187 & 188 : n. spp. 
