《catlaogue of the blastoides in the geological depart of the British musuem》

MORPHOLOGY1

CHAPTER Ⅰ.—THE ZOOLOGICAL HISTORY OF THE BLASTOIDEA1

CHAPTER Ⅱ.—THE STEM AND CALYX9

A. The Stem9

B. The Calyx10

C. The Basals12

Dorsal and radial axes13

Ridges on the basal cup16

Supposed under-basals of Blastoids18

D. The Radials22

Homologies of the radials26

E. The Deltoid Plates or Interradials28

Deltoids of Heteroschisma30

Stephanocrinus34

El?acrinus35

Troostocrinus36

F. On the Homologies of the Deltoid Plates37

G. Irregularities of the Calyx, and Monstrosities39

CHAPTER Ⅲ.—THE AMBULACRA42

A. The Lancet-plate and its Internal Relations42

Under lancet-plate44

Lancet-canal50

CEsophageal ring52

B. The Superficial Markings of the Lancet-plate54

C. The Side Plates56

D. The Outer Side Plates61

E. The Pinnules63

F. The Covering Plates of the Ambulacra63

CHAPTER Ⅳ.—THE SUMMIT-PLATES66

Homologies of the Summit-Plates71

CHAPTER Ⅴ.—THE HYDROSPIRES AND SPIRACLES76

A. Historical76

B. Descriptive87

1. The Hydrospires87

2. The Spiracles96

CHAPTER Ⅵ.—THE ZOOLOGICAL CHARACTERS OF THE BLASTOIDEA113

Definition of the Pelmatozoa117

Definition of the Blastoidea117

Regulares and Irregulares122

Mutual relations of the Genera125

DISTRIBUTION129

CHAPTER Ⅶ.—THE GEOLOGICAL AND GEOGRAPHICAL DISTRIBUTION OF THE BLASTOIDEA129

Silurian forms129

Devonian forms129

Carboniferous forms133

Table showing the Distribution of the Genera of the Blastoidea in Space and Time136

A Stratigraphical List of all known Blastoids, arranged geographically137

Species from the Upper Silurian137

Species from the Devonian137

Species from the Carboniferous Limestone140

CLASSIFICATION146

CHAPTER Ⅷ.—DESCRIPTIONS OF THE SPECIES146

Synopsis of the Orders, Families, and Genera146

Order Regulares148

Family Pentremitid?148

Definition of genus Pentremites151

History of the genus152

General characters154

Pentremites Godoni, Defrance, sp157

var. major, var. nov160

var. florealis, Schlotheim, var160

var. abbreviates, Hambach, var160

CHAPTER Ⅷ.—DESCRIPTIONS OF THE SPECIES (continued).Pentremites elongatus, Shumard161

conoideus, Hall162

sulcatus, Roemer165

obesus, Lyon167

pyriformis, Say167

Definition of genus Pentremitidea169

General characters170

Pentremitidea Paillettei, de Verneuil, sp172

Lusitanica, E.C173

Eifelensis, Roemer, sp174

Malladai, E. C175

clavata, Schultze, sp176

var. Schultzei, E. C., var177

Wachsmuthi, sp. nov178

Gilbertsoni, sp. nov179

angulata, E. C180

similis, E. C180

Definition of genus Mesoblastus181

General characters182

Mesoblastus crenulatus, Roemer, sp183

angulatus, G. B. Sowerby, sp185

elongatus, Cumberland, sp186

Sowerbii, sp. nov187

Rofei, sp. nov188

Family Troostoblastid?190

Definition of genus Troostocrinus191

General characters192

Troostocrinus Reinwardti, Troost, sp194

Definition of genus Metablastus196

General characters197

Metablastus lineatus, B. F. Shumard, sp199

Hispanicus, E.C200

Cottaldi, Mun.-Chalmas, sp201

Definition of genus Tric?locrinus203

General characters204

Triccelocrinus obliquatus, Roemer, sp206

Meekianus, sp. nov208

Family Nucleoblastid?209

Subfamily El?acrinid?210

Definition of genus El?acrinus210

General characters212

CHAPTER Ⅷ.—DESCRIPTIONS OF THE SPECIES (continued).El?acrinus Verneuili, Roemer216

var. pomum, var. nov218

angularis, Lyon, sp219

sp219

Subfamily Schizoblastid?220

Definition of genus Schizoblastus220

General characters221

Schizoblastus Sayi, Shumard, sp224

melonoides, Meek and Worthen, sp226

Rofei, E.C228

Definition of genus Cryptoblastus229

General characters230

Cryptoblastus melo, Owen and Shumard, sp232

Definition of genus Acentrotremites234

Acentrotremites ellipticus, Cumberland, sp235

Family Granatoblastid?237

Definition of genus Granatocrinus238

General characters240

Granatocrinus Norwoodi, Owen and Shumard, sp245

orbicularis, G. B. Sowerby, sp248

Derbiensis, G. B. Sowerby, sp250

campanulatus, M`Coy, sp251

M'Coyi, sp. nov252

ellipticus, G. B. Sowerby, sp253

Definition of genus Heteroblastus255

Heteroblastus Cumberlandi, sp. nov257

Family Codasterid?257

Subfamily Ph?noschismithe258

Definition of genus Codaster259

General characters261

Codaster pyramidatus, B. F. Shumard266

trilobatus, M'Coy268

var. acutus, M'Coy, var269

Definition of genus Ph?noschisma270

General characters271

Ph?noschisma Verneuili, E.C273

Archiaci, E. C274

nobile, E. C275

acutum, G. B. Sowerby, sp276

caryophyllatum, de Koninck, sp. 277

Benniei, sp. nov278

CHAPTER Ⅷ.—DESCRIPTIONS OF THE SPECIES (continued).Subfamily Cryptoschismid?279

Definition of genus Cryptoschisma280

Cryptoschisma Schulzi, d'Archiac and de Verneuil, sp281

Definition of genus Orophocrinus283

General characters284

Orophocrinus stelliformis, Owen and Shumard, sp287

var. campanulatus, Hambach, var289

vents, Cumberland, sp290

pentangularis, Miller, sp292

Order Irregulares294

Family Astrocrinid?297

Definition of genus Astrocrinus297

General characters298

Astrocrinus tetragonus, T.T. Austin300

Benniei, Etheridge, jun301

BIBLIOGRAPHY303