GENEHA AND GROUPS OF THE ECHINOIDEA. 



291 



Order IV. 

 CLYFEASTEOIDA, p. 142. 



Family FIBULAEIID^, p. 144. 



Genus 

 Bchinocyamus, p. 144. 



Subgenus Scutellina, p. 145. 

 Sismondia, p. 145. 

 Fibularia, p. 146. 

 Euna, p. 147. 

 Moulinsia, p. 147. 

 Eotuloidea, p. 148. 



Family CLYPBASTEID^, p. 148. 



Genus 

 Clypeastei-, p. 151. 



Subgenus Monostychia, p. 153. 

 Diplotheeanthus, gen. nov., p. 153. 

 Plesianthus, gen. nov., p. 154. 

 Anomalanthus, p. 155. 



Family LAGANID^, p. 166. 



Genus 

 Laganum, p. 156. 



Family SOUTELLID^, p. 157. 



Genus 

 Scutella, p. 158. 



Subgenus Echinarachnius, p. 158. 

 Echinodiscus, p. 159. 

 Encope, p. 160. 



Subgenus Monophora, p. 161. 

 Mellita, p. 161. 



Subgenus Mellitella, p. 162. 



Astriclypeus, p. 163. 

 Lenita, p. 163. 

 Mortonia, p. 163. 

 Eotula, p. 163. 



Subfamily Arachnince, p. 165. 



Genus 

 Arachnoides, p. 165. 



Order V. SPATANGOIDA, p. 166. 



Suborder I. Oassiduloidea, p.l66. 



Family ECHINONEID^, p. 166. 



Subfamilies EchinoconiiuB, Ec-hino- 

 neintB, OligopygincB, EchhiobrissincB. 



Subfamily EohinoconincB, p. 167. 



Genus 

 Echinoconus, p. 167. 

 Lanieria, gen. nov., p. 168. 

 Adelopneustes (see Concluding Note, 

 p. 305). 



Subfamily Echinoneinm, p. 168. 



Genus 

 Ecbinoneus, p. 169. 

 Amblypygus, p. 170. 

 Caratomus, p. 170. 

 Pygaulus, p. 171. 

 Pyrina, p. 172. 



Subgenus Nucleopygus, p. 172. 

 Anorthopygus, p. 173. 



Subfamily Oligopyginm, p. 173. 



Genus 

 Haimea, p. 174. 

 Oligopygus, p. 174. 



Subfamily Echinohrissinee, p. 174. 



Genus 

 Echinobrissus, p. 175. 



Subgenus Docbmostoma, p. 176. 

 Oligopodia, p. 176. 

 Anochanus, p. 177. 

 Botriopygus, p. 177. 

 Ilariona, p. 178. 



Genera incertse sedis : 

 Desorella, p. 179. 

 Oviclypeus, p. 179. 



Family OASSIDULID^, p. 180. 



Alliance. 

 Genus 

 Cassidulus, p. 181. 



Subgenus Ehynchopygus, p. 182. 

 Pygorhynchus, p. 182. 

 Stigmatopygus, p. 182. 

 Echinanthus, p. 183. 



Subgenus Hardouinia, p. 183. 

 Eurhodia, p. 184. 

 Paralampas, p. 184. 



Alliance. 

 Genus 

 Catopygus, p. 185. 



Subgenus Studeria, subgen. 

 p. 185. 

 Neocatopygus, p. 186. 

 Phyllobrissus, p. 187. 



nov. 



Alliance. 

 G«nus 

 Olypeus, p. 187. 



Subgenus Olypeopygus, p. 188. 

 Pygurus, p. 188. 

 Faujasia, p. 189. 

 Galeroclypeus, p. 189. 

 Pseudodesorella, p. 190. 

 19* 



