8 



CONTENTS. 



INCKRTAE SEDIS (continual . 



Xenocidaris Schultze 454 X. conifera Schluter . 



A', clarigera Schultze. Genotype . . 455 X. cylindrica Schultzo . 456 



NoMlNA NUDA 456 



Archaeocidaris tirolensis Stache . . 456 Lepidocentrus desori Dollo and Buissorot . 457 



Echinocrinus cidariformis (?) T. and T. Lepidocentrus duponti Dollo and Buisseret . t.">7 



Austin 456 Lepidocentrus gaudryi Dollo and Buisseret . 457 



Echinocrinus immuin T. and T. Austin . 456 Melonites youngi Young .... 457 



Heterocidaris Hall 456 Palaechinus agassizi Dollo and Buissorot . 457 



Heterocidaris keokuk Hall . . . 450 Palaechinus carpenleri Dollo and Buisseret 458 



Heterocidaris laerisirina Hall . . . 450 Palaechinus loveni Dollo and Buisseret 45S 



PALAEOZOIC FORMS INCOKKECTLY REFERRED TO ECHINI 



Discocystis Gregory 458 Myriastiches Hollas ... 458 



D. kaskaskiensis (Hall) .... 458 M. gigas Sollas 



D. opUitus (Worthen and Miller) . . 458 Palaechinus sp. Mitchell 458 



D. sampsoni (Miller) .... 485 Spatangopsis Torell . 



S. coslata Torell 458 



BIBLIOGRAPHY .459 



INDEX 47S 



ERRATA AND ADDENDA . 491 



