CRINOIDEA, CYSTIDEA. . (IV, F, G.) Echin. 101 
tG. CYSTIDEA* * 
(including Edrioasteroidea). 
Cystoidea classified in Orders 1. Thecoidae, 2. Carpoidae , 3. Hydrophoridae 
= Cystidea s. str., with Sub-orders Rhombifera and Diploporita ; 
Zittel (339) pp. 169-178. Cyst, classified as 1. Edrioasteroidea , 
2. Carpoidea , 3. Dichoporita , 4. Diploporita , 5. Blastoidea [vide IV, h] 
(p. 191), certain of these forms might prove separable as Cysto- 
stellcroidea, Cystoholothurioidea , Cystocrinoidea , and Cystechinoidea 
(p. 201) ; Steinmann (299). 
Carpoidae, defined as Order (p. 170) comprises Anomalocystidae, Malaco- 
cystidae[ sic], Cryptocriniaae ; Zittel (339). 
Caryocrinus bulbulus and C. milliganae (p. 712), C. ornatus (pp. 562, 572, 
711); Foerste (84). 
Coelocystis n. g. of Callocystinae ?, with genotype Hemicosmites subglobosus 
Hall = Sphaerocystis dolomiticus Jaekel; Schuchert (289) p. 234. 
Cystechinoidea , suggested for supposed linking forms of Cyst, and Blast . ; 
Steinmann (299) p. 201. 
Cystocrinoidea , suggested for supposed linking forms in Dichoporita and 
Diploporita ; 1. c. 
Cystoholothurioidea, suggested for supposed linking forms in Carpoidea or 
Dichoporita ; 1. c. 
Cystostelteroidea, suggested for Edrioasteroidea . ; 1. c. • 
Diploporita, sub-ord. of Hydrophoridae , comprise Aristocyst-, Sphaeron -, 
Gomphocyst-, Glyptosphaer-, Protocrin -, Mesocyst-idae ; Zittel (339) 
pp. 176-179. 
Hemicosmites subglobosus , vide Coelocystis. 
Holocystis papulosusl , discussion of genus; Rowley in Greene (119) 
p. 166, pi. xlviii. 
Hydrophoridae ord. nov. pro Cystidea s. str. diagnosed (p. 172) comprise 
sub-ordd. Rhombifera and Diploporita ; Zittel (339). 
Jaekelocystis n. g. of Apiocystinae [Jaekel, = Callocystinae Bather pars] 
(p. 230), with genotype J. hartleyi n. sp., Upper Silurian, Manlius 
beds, Keyser, W. Va., holotype in U. S. Nat. Mus. ; Schuchert (289) 
p. 231. 
Macrocy Stella inariae ; Fearnsides (82). 
Marginata , subord. of Carpoidea Jaekel 1901, nom. preocc. Reptilia 
Schoepf and Mollusca Ferussac ; Cossmann (38). 
Pseudocrinus clarki (p. 237), P. gordoni (p. 235), P. perdewi (p. 238), P. 
stellatus (p. 236): n. spp., Upper Silurian, Manlius beds, Keyser, 
W. Va., holotypes in U. S. Nat. Mus. ; Schuchert (289). 
Rhombifera, sub. -ord. of Hydrophoridae , comprise Echinosphaerit-, Caryo- 
crin-, Macrocy stell -, Chirocrin -, Scoliocyst-, Pleurocyst-, Callocyst-, 
Cystoblast-idae ; Zittel (339) pp. 172-176. 
Sphaerocystis, rediagnosed (p. 232', S. dolomiticus refd. to Coelocystis 
(p. 234), S. globularis n. sp., Upper Silurian, Manlius beds, Keyser, 
W. Va., also near Cumberland, Md., cotypes in U. S. Nat. Mus. 
(p. 233) ; Schuchert (289). S. multifasciatus , precise horizon ; Schu- 
chert (287) pp. 417, 418, 423. 
' Thecoidae , defined as Order [ = Edrioasteroidea] comprises Thecocystidae , 
Agelacrinidae ; Zittel (339) p. 169. 
f All extinct. 
* Names that are sometimes given the termination -ites (e.g. Anomalocystites) 
are here treated as always ending iii -us, -a, or -is, as the case may be. 
