x 
PAGE 
Helix rupestris, Drap............. 121 
v. viridescenti-alba...... 122 
Helix sericea, Miill. ............... 116 
WislCOT20CG Vcc ccesccuvcsseesee 116 
WACO T2TULUL Wants oe cotencee 116 
Var LOT ee weeten aces doers ek 116 
Helix virgata, Da Costa......... 118 
Vie @LOUCOIS Me weeds 118 
Wa yNU Ul Chins. dissects toades 118 
Wie OU USCIOLM eta sscaseesce 118 
Vall CUCOZONM vee aceweescdes 118 
v. ochroleuca ..... Sescivad 118 
Wisk ILEGMIESCOIUS Sarees open cece 118 
Vit CESSELLOUA owes cccanasee 118 
Wisi LULESCOTIS Pl watt aes acest 118 
Wis PEILUSCOMS)-es.cosd-aco er. 118 
V. hYPOZONALA .....0.00008 118 
Vi SUBMATITLMA .aseeoeee 119 
Wik STEU MOLL A Se cedesonte 119 
Vie SUORPCT LO svesassescases 119 
Vis SILOQLOUGSEa: wncvcousaees 119 
VW UCLLUD PPR ateaeon. Scoseves 119 
Ni COMUILG LAr ioecoane 119 
WIL ON wacerinte teeta coc ete ss 119 
Vie KIECILOM I AS.4 ceomaihecaes cde 119 
IM. SUNUSENOTSUIM .0.c00c0e 119 
Hydrobia similis, Drap. ...... 63 
Hydrobia ventrosa, Mont....... 63 
VE ILLTONp OS tame cteaes ons cee 63 
Vis GECOUIGED ences cewcenne 63 
Wie OVOLO): shevescrsencswackes’ 63 
WEL CLOMO MUL vasa esy cor sotees 63 
Win) CLIUCTUD Gees sdaene ses 63 
Limnea auricularia, Linn. ... 76 
Wel DELQNO Wace cael sielsncess 76 
Wi CPL LON A ot eee nteces 6 77 
WAL ELIIUTIUG Misce. caaee ees coe 77 
Vie TICE TO Me nia. t va seews vane 77 
Vi PAIOMMANCU ened sce va: 77 
WV, «| LOUDON: eaeceaks sacs es vse 77 
Wis LOOM Peete st loctk's 77 
Limnea glabra, Miull............. 82 
Wi MROIOT ay. woetzerseeses see 82 
Vis CLONG ALAS hiccesneecssces 82 
Wl. Gecollatwn ress. ccece 82 
Limnea glutinosa, Mill. ...... 73 
Vis TMUCTONAUC Nes» ves ap see 73 
AN 27 LOMLITE ter te esos 73 
Limneza involuta, Thompson 73 
Limnea palustris, Mill. ...... 79 
Vc COMUE eeeoserdins dss cnes 79 
Vie [iASCLOLanaewsidseacees 80 
Via UOT seeoteseh cen cease 80 
Index. 
PAGE 
Limnea palustris, Miill—contd. 
V. lacunosa  ....... pane (BO 
Vi. AUSJUNCLO: neck ccascoees 80 
Vis ODESH NETS a teem 80: 
Vin QLOLA OG tsecede dose ceeeee 80 
v. roseo-labiata ........- 80 
Viet LUNCLG cnescteescosstreore 80 
Vs [COMLCO ch caeestecaeeeeetee 80 
M. AngulatumM ....e.ce000 80 
MN COPLNALUND Ons.nereeaioe 80 
m. decollatum .......0.00. 80 
TN), CUA ULL Reee ncen ee aie 80 
Limnea peregra, Mill. ......... 73 
V. Burnetite acre 74 
V. SOLEMLD Hee ke rete 74 
V. OVALIFOTMIS ....0.000008 74 
Vi) CORAL en teens 74 
v. stagnaliformis ...... 74 
VirQ2UGLAG) eaten ce reeset 74 
Vis OVUGQEE Jcccgcessseerspenee 74 
Vs CLOTOSA once one eesetees 15 
Vi NLQCUSETES Borers easeeee 75 
V ib UbOG ga ebecceceanae 75 
Vin CLUINUALa yess epee 15 
V. wterMedta .....ees000e 15 
Vai OULONGD Maresette son omene 75 
Vi DUCE! ionnce cean ee aner 75 
Vie MONUCUNG ceekscaceetaae 75 
Vie. CLHELEDMacsennanseeeeneer 75 
V. SUCCINEFOTINAS ....0.006 76 
mM. decollatuin ee acces 76 
IM. | SUNUSEVORSUMD ae eemeeee 76 
m. scalariforme ....... 76 
Limnea stagnalis, Linn. ...... 77 
Vii f PAQUISS. cioacuosenaeeeree tire 
V.. TOSCOLADIALE ......20000s 78 
v. scalariforme ......06+ 78 
Vis CLPUNSH: atratensactartet 78 
V. VATUEGATA. ....005 Sacndeo: 78 
Vc QECOUAEG Seca edeeceeee 78 
v. elegantuld,........000. fat tle) 
Vi QLD1d Ge teeesee cee 79 
Limnea truncatula, Miull....... 81 
Wick 700/00 naatece nee eeteneee 1 
Vis MUNOT erase ce tase 81 
Ve VENENUCOSO a sreveencesvee 81 
Vie MUCYOSEONIG (ee. ceesecere 81 
Vie CLEGANS Vata erate see ete 81 
Vis QUOTA) yee ee eee eee 82 
M. SCAlATLFOYME.......000+ 82 
Mussel, Fresh-water, Anatomy 
OF wcisistorihesesbeecs ope reese some 23--30 
Neritina fluviatilis, Linn. ...... 1 EY) 
