Hawaiian and other Pacific Echini. No. 2. The Echinoneidae, Nucleolitidae, Urechinidae, Echinocorythidae, Calymnidae, Pourtalesiidae, Palaestomatidae, Aeropsidae, Palaeopneustidae, Hemiasteridae and Spatangidae. Memoirs of the Museum of Comparative Zoology at Harvard College Cambridge 46 1917: (81-283). 241 [Zoological Record Volume 54]