290 



PKOF. P. M. DUNCAN S EP:VISI0N OF THE 



Genus 

 Peronia, gen. nov., p. 82. 

 Echinopsis, p. 83. 

 GymnocliacTema, p. 83. 



Genus incertse sedis : 

 Progonecliinus, p. 84. 



Family CYPHOSOMATID^, p. 85. 

 Division I. 



Genus 

 Cypbosoma, p. 86. 



Subgenus Leiosoma, p. 87. 

 Coptosoma, p. 87. 

 Gauthieria, p. 88. 

 Thylecbinus, pp. 89, 305. 



Division II. 



Genus 

 Micropsis, p. 91. 



Subgenus G^garia, subgen. nov., 

 p. 91. 



Family AEBACIIDtE, p. 92. 



Genus 

 Arbacia, p. 93. 



Eebinocidaris, gen. nov., p. 94. 

 Coelopleuinis, p. 94. 

 Podocidaris, p. 96. 



Family TEMNOPLEURID^, p. 96. 



Subfamily Gli/phocyphincB, p. 96. 



Genus 

 Glypbocyphus, p. 97. 

 Dictyopleurus, p. 99. 

 Arachniopleurus, p. 100. 

 Ortbolopbus, p. 100. 

 Paradoxecbinus, p. 101. 

 Echinocyphus, p. 101. 

 Zeuglopleui'us, p. 103. 

 Lepidopleurus, p. 104. 

 Leiocyphus, p. 104. 

 Coptophyma, p. 104. 

 Trigonocidaris, p. 105. 



Subfamily TemnopleurintB, p. 106. 



Genus 

 Temnopleurus, p. 106. 



Subgenus Pleurecbinus, p. 107. 

 Temnechinus, p. 108. 

 Salmacis, p. 109. 



Subgenus Salmacopsis, p. 110. 

 Mespilia, p. 110. 

 Microcv'pbus, p. 111. 

 Amblypueustes, p. 112. 



Genus 

 Goniopneustes, nov. gen., p. 113. 

 Holopneustes, p. 114. 



Genus incertse sedis : 

 Grammecbinus, p. 115. 



Family ECHINOMBTRID^, p. 115. 

 Subfamily EchinometrincB, p. 115. 

 Genus 

 Heterocentrotus, p. 116. 

 Colobocentrotus, p. 117. 

 Ecbinometra, p. 118. 

 Stomopneustes, p. 119. 

 Parasalenia, p. 120. 



Subfamily Folyporinm, p. 121. 

 Genus 

 Strongylocentrotus, p. 121. 

 Sph^recbinus, p. 122. 

 Ecbinostrepbus, p. 123. 

 Pseudoboletia, p. 123. 

 Eurypneustes, p. 124. 

 jEolopneustes, p. 125, 



Family ECHINID^, p. 126. 



Genus 

 Eebinus, p. 126. 



Subgenus Psammecbinus, p. 127. 

 Stireobinus, p. 128. - 

 Glyptecbinus, p. 128. 

 Leiopedina, p. 129. 

 Hypecbinus, p. 129. 

 Tosopneustes, p. 131. 

 Boletia, p. 131. 

 Tripneustes, p. 132. 



Subgenus Evecbinus, p. 133. 



Genus incertse sedis : 

 Prioneckinus, p. 134. 



Order III. 

 HOLECTYPOIDA, p. 135. - 



Section I. 

 Genus 

 Holectypus, p. 136. 

 Pileus, p. 136. 

 Pygaster, p. 137. 

 Pygastrides, p. 138. 



Section II. 

 Genus 

 Discoidea, p. 138. 



Subgenus Ecbinites, subgen, nov., 

 p. 139. 

 Conoelypeus, p. 140. 



Genera incertaj sedis : 

 Galeropygus, p. 141. 

 Pacbyclypeus, p. 142. 



