▁( of ▁which ▁he ▁was ▁joint ▁author ) ▁appeared ▁in ▁Pal æ ont ologia ▁Ind ica , ▁ 1 8 8 2 - 6 . ▁▁ ▁He ▁made ▁a ▁special ▁study ▁of ▁the ▁cor als ▁and ▁e chin ids , ▁taking ▁also ▁much ▁interest ▁in ▁the ▁o phi ur ids , ▁sp ong es , ▁and ▁proto zo a , ▁regarding ▁all ▁questions ▁from ▁the ▁point ▁of ▁view ▁not ▁only ▁of ▁the ▁philosoph ical ▁zo ologist , ▁but ▁also ▁of ▁one ▁who ▁applied ▁the ▁distribution ▁of ▁species ▁to ▁el uc id ate ▁ancient ▁physical ▁ge ography . ▁ ▁He ▁described ▁the ▁foss il ▁cor al ▁fa una ▁of ▁Mal ta , ▁Java , ▁H indust an , ▁Australia , ▁Tas mania , ▁and ▁the ▁West ▁Ind ies , ▁the ▁e chin ids ▁of ▁S ind , ▁and ▁of ▁other ▁countries . ▁The ▁results ▁of ▁these ▁research es ▁were ▁sum med ▁up ▁in ▁two ▁very ▁valuable ▁papers , ▁' Re vision ▁of ▁the ▁Mad re por aria ,' ▁published ▁by ▁the ▁Lin ne an ▁Society ▁in ▁August ▁ 1 8 8 4 , ▁and ▁' ▁Re vision ▁of ▁the ▁Gener a ▁and ▁Great ▁Gr oups ▁of ▁the ▁E ch ino idea ,' ▁published ▁by ▁the ▁same ▁society ▁in ▁ 1 8 8 9 . ▁O thers ▁papers ▁on ▁the ▁' Phys ical ▁Ge ology ▁of ▁Western ▁Europe ▁during ▁Mes oz o ic ▁and ▁Cam oz o ic ▁Times , ▁el uc id ated ▁by ▁the ▁Cor al ▁Fa una ,' ▁on ▁' The ▁Form