▁in ▁the ▁ 1 8 8 0 s ▁Category : American ▁black - and - white ▁films ▁Category : Sam uel ▁Gold w yn ▁Produ ctions ▁films ▁Category : Fil ms ▁based ▁on ▁American ▁nov els ▁Category : Fil ms ▁directed ▁by ▁Ir ving ▁Re is ▁Category : American ▁films ▁Category : H at field ▁family <0x0A> </s> ▁Crit he ▁is ▁a ▁genus ▁of ▁minute ▁sea ▁sn ails , ▁marine ▁g ast rop od ▁m oll us ks ▁or ▁mic rom oll us ks ▁in ▁the ▁family ▁C yst isc idae . ▁This ▁genus ▁is ▁sometimes ▁still ▁placed ▁within ▁the ▁Mar gin ell idae . ▁ ▁These ▁tiny ▁g ast rop ods ▁have ▁a ▁shell ▁which ▁is ▁color less ▁and ▁is ▁transparent ▁when ▁fresh . ▁ ▁Distribution ▁This ▁genus ▁is ▁found ▁in ▁the ▁Ind o - P ac ific . ▁ ▁Sh ell ▁description ▁Sh ell ▁minute ▁to ▁small , ▁white , ▁h yal ine ; ▁sp ire ▁usually ▁imm ers ed , ▁rarely ▁low ; ▁lip ▁thick ened , ▁smooth , ▁lack ing ▁d entic ulation ; ▁external ▁var ix ▁absent ; ▁si ph onal ▁not ch ▁absent ; ▁posterior ▁not ch ▁absent ; ▁col um ella ▁multip licate , ▁with ▁ 6 - 8 ▁p lications ▁plus ▁par iet al ▁li ra e , ▁p lications ▁usually ▁exc av ated ▁inside ▁a pert ure ▁due ▁to ▁coll ab ral ▁par iet al ▁call us ▁r idge . ▁ ▁Type ▁species ▁ ▁Crit he ▁atom aria ▁G ould , ▁ 1 8