CYSTIDEA, BLASTOIDEA. =' IV, G, H, 
Ech. 69 
(G). — f CYSTIDEA. 
Cystidea , auctt., divided into Thecoidea and Cystoidea , the former con- 
taining Hemicystis , Cy taster, A gelacrinus , Cyathocystis, and allies ; 
Jaekel (68) p. 110. General account, with classification into 
Families : Aristocystidce, Sphceronitidce , Camarocystidce , Echino - 
sphwritidce, Cryptocrinidce , Caryocrinidcc, Anomalocystidce , Gallo- 
cys tides, Agelacrinidce ; Zittel (180) p. 148. 
Agelacrinus faberi, uppermost part of Hudson R. Group, halfway between 
Osgood and Versailles, Ind. ; Miller & Faber (113) J. Cincinnati 
Soc. xvii, p. 156, n. sp. . 
Caryocrimis Tcentuchiensis, Niagara Group, Louisville, Ky. ; Miller (114) 
p. 59, h. sp. 
Comar ocystites obconicus , C. shumardi ; Keyes (70) p. 132. 
Cyclocystoides illinoisensis , Hudson R. Group, Orchard Creek, Alexander 
Co., 111. ; Miller (114) Bull. Illinois Mus. vi, p. 61, n. sp. 
JSchinodimis hashislciensis] Keyes (70) p. 133. E. sampsoni , Miller,' “almost 
too imperfect for recognition ” ; l. c. 
Echinoencrinus armatus, see Schizocystis. 
JIolocystite8 asper (p. 84), II. sphccroidalis (p. 85), Niagara Group, Madison, 
Ind. ; Miller (115) Bull. Illinois Mus. vii : n. spp. 
Fleur ocystites mercerensis , Trenton Group, Mercer Co., Ky. ; Miller 
(114) Bull. Illinois Mus. vi, p. 60, n. sp. 
Proteroblastus , n. g., Lower Silurian, Russia, not defined and no type-sp. 
mentioned ; Jaekel (68) Verb. Deutsch. Zool. Ges. 1895, p. 112. 
Schizocystis , n. g., with type Echinoencrinus armatus , Forbes ; Jaekel 
(68) Verh. Deutsch. Zool. Ges. 1895, p. 113. 
Stribalocystites sphccroidalis , Niagara Group, St. Paul, Ind.; Miller (114) 
Bull. Illinois Mus. vi, p. 58, n. sp. 
Thecoidea, see Cystidea. 
Trochocyslis cannati, imperfectly described from fragments, Middle Cam- 
brian, Coulouma in l’Herault, France ; Miquel (116) Bull. Soc. 
Beziers, xvii, p. 9, n. sp. 
(H). — f BLASTOIDEA. 
General account, with classification after Etheridge & Carpenter; Zittel 
(180) p. 158. 
Codaster gratiosus, Miller, “too imperfect for recognition” ; Keyes (70) 
p. 142. 
C. blairi , Chouteau Limestone, Sedalia, Mo. ; Miller (115) Bull. Illinois 
Mus. vii, p. 86, n. sp. 
Cryptoblastus JcirJcwoodensis and G. melo , both refigured ; Keyes (70) 
p. 139. 
+ All extinct. 
