INDEX TO THE GENERA. 
PacE 
Achatinaernacyivanccisvscetavese cause 132 
PAG) eur pec aRE eT CE CCP Ee EERE ICC 135 
ACEBOMAES Ease vest senece tense etaees 123 
Amphidesma, v. Syndosmya. 
Amphisphyra, 
TCAs sceeevisveseses Sas cuawes Siesecauee 173 
Arion, ata ABER I 43) 
Artemis, ......0.. Shesanescaonees sooner dl gs} 
Ascidia, .......0. ssecieneneacrstaceeces 199 
MAIS bartesee ds newass Gone cee ce cea taoes 180 
Auricula y. Conovulus. 
ZOCAMRSO cs senatconecne ceseeen tees 
Balen ass tse ioc emecceecsecceeeteutiad 
Bithiniasycesecseecs 
Botrylloides, 
IBotryllusiiiec..ccisccseosee cee sseteees 
Buccinum, 
IBULIMUSs | eccosactcectsesstsesteanscecs 132 
Bulla eR GeO aieae menens 121 
Bullea, ......- Betsisceherces SS eee 118 
Cas CUI A eeikeccceostascessessecnesace 168 
Capulus, ....... pcpanedadHodacronbddes 165 
Cardiumns eeseouestscoestacneesecneeoss 177 
Cary chigimimccsce:) casscesctecnecsses aloo 
Geri thiumsmrccceseccceseee coset: 154 
Chemnitzidaeuncesctonecenteetecses 142 
Chitonse eiesiecsecdessdascsceeeene lOO: 
Clasiliany ecccscencccecssetescccsee LOS 
Clavellinascersconecptsiscsseccoccesessese 202 
CWonovulgs: oeiievecwsccseccsscecescese 135 
Corbilascecscesdescseceacssse Bethan 190 
Coriocella, v. Lamellaria. 
Crenella, .........6 Bale dles Seanccctlesnes 176 
Cryptodon, 
Cyclasieii.sce- 
Cynthia, 
Gy preeayrasesceccecoccoscsisesescmsccssass 
Wy primase yecsnctecccaceatscdeceesese 
Dendronotus, .......c0...seecececeees 113 
Dentaliumyy Wiiietecncsessssscese sees 168 
IDYeS RES GacodgEasocdboddsens0o000G0000000 181 
WD OvISs secon tcecescticceecse sacs podacébaEcS 109 
IDG), aecoeoboaneonanosecocgdaSHboadc6000 114 
led ones escce se iasacoventscsuenseoens 107 
Himarginula, ....0....sesceseeseeseenees 164 
TOE egaqoe0b0005000 aessies silanes asesives 114 
Mulia secercesrteecsasesesess eelecseeens 140 
PAGE, 
Giomlodorisy 2iorcesccstecscccscecceeeee 111 
C)E Se Sa ae ees 127 
TIGEITE NS oonconnone salsa cacueuecaueniaeiees 112 
Keelliai, tos esisrdscd ie caiee g Sie ualoes 187 
IDE O10) nie Ree HE SN EMEEE EH SNaricHaotood.cb0 151 
Tamellariagiscstss accesses meses 164 
Toediay c8eseengecneoes bea) uaa BS eee 173 
Leptoclinum, .......... panb0000000000 204 
Liepton sccscadivecscissetvecceoesuescnsese 187 
Biman so ae ecm 172 
Limapontia, ....cc..2) seeasverececsss 117 
WiMax: 5c sacanestoessce coone sheen RPLZO 
Limnea, 8 AS eae 136 
Littorimay <tc. ...cesnevessseccesteseees 149 
WOO, velecetesscsstcs cur qeereusnuene 108 
WOttia, ee sceeet causa uensueeeeneeee 166 
Liucina, ......000....- stiesenaseeaaeceaee 185 
Wutrarias vscuceeseetee ee ee 
Lyonsia, ...... vewdeesse agncueacuenontes 192 
Mactras ic ik ected eee 
Margarita, 
Modiola, 
Molgula, 
Montacuta, y 
Murex, ....... ease sselaesnes Ooee ee eeeee 160 
Yagi eek esac sawes scovedeeareseeer ecole 
MiyGilusssasicecesmestss se aecleeseuortasee 174 
TEAST a ee a 161 
IN abi Cae yee. Stiweaoncees aseeaeociteres 162 
ING2OLascacrecaeecessecvccstcceseesereres 190 
Neritinas 7 22.020) iigedste Ween coeeemloe 
Nuculay ss. 2iccc ie vcactasrendseennesees 173 
Octopus, v. Eledone. 
QOdostomia, Geeccccessscessceorecsess 144 
(O75 hy st: Rian nR PRB eer rioacnebuicctincooccod 170 
Paludina, v. Bithinia. 
Panopeea, .........- sesegnoseeaseceneees 193 
Patella, ijccestscssseceesestecsenoaers «. 165 
Rectenspeetecisnccrsteserccccersecscerene 170 
Pectunculussssasccessuoceceenterneneee 172 
Pelonaiasiiscccccccctscsctencieessdcascees 195 
TPO ENS Gap Gaonocenbecoa0Gbo0bad000000000 194 
Phy sae or Ue ease ete ane snes oo dlBis 
PISiGivim, eas cosheesessecessoseseoee 186 
Planorbisy iiewsccvsoeccestoeceseeee 1857/ 
Pleurrobranchus, .........scesereeeres 118 
Bleurotomas)....<-eccssceemstccseettcs 155 
Roliyceras c..cvcesscesesecessncsecmacas Jil 
Bolyclinum, -...---.ccceseeeeeroesisn 00 
Psammobias) scocs.ccesccesiecoseessinc 183 
IRullastras oapescossoeccesesccrosenteee 180 
Puncturellan.cencdcseccescecsseccces 164 
LEAT OF oaescnococooacossonse condbde00 000000 133 
IPI DITR SAGnoncccoosnoononss0000000000 160 
Rissoas, cocsssetstencsesetecccscseoueens 147 
SEPA TCER ny ipodoopoconboobadgoncoGo0 ode000 194 
