Xanthonyx, Cordovanus P. 229 
— $Salleanus P. 
— Sumichrasti Brot. . 
Xerocampylaea, Ss. Hel. 
Xeroleuca, Ss. Hel. 
Xerophila, S. Hel. 
—  apicina Held. 
—  cespitum Held. 
— conica Held. 
—  ericetorum Held. 
—  filimargo Held. 
—  Gargottae Held. . 
—  neglec:a Held. 
—  pisana Held. 
—  pyramidata Held. 
—  striata Held. 
—  Terveri Held. 
—  thymorum Held. 
— variabilis Held. 
Xesta, Ss. Nan. 
—  bistrialis Smp. 
—  citrina Smp. . 
—  Cumingi Smp. 
— distincta Smp. 
—  ligulata Smp. 
—  maderaspatana Smp. 
—  Mindanaénsis Smp. 
—  tranquebarica Smp. 
Xolotrema, S. Hel, 
—  appressa Tryon.. 
—  obstricta Tryon. 
—  palliata Tryon. 
Zebra, S. Orthal. 
Zebrina, S. Bulimin. 
— dealbata Held. 
—-  fasciolata Held. 
— radiata Held. . 
Zenobia, Ss. Hel. 
—  Moquiniana Raym. 
Zonites, S. Hel. 
— Gen.. , 
Zonites, Gen. 
— acies Bartsch. 
—  acutimargo Ad. . 
—  aequatus Mss. 
— albanicus Zgl. 
—  a2lbocincta Alb. 
—  algira Bk. . 
—  algireus Mtf. . 
—  alliarius Gr. 
—  alligans Sh. 
—  amphicyrtus Bgt. 
—  approximata Ad. 
—  arietinus Braz. 
—  atlantieus Mss. 
—  baetica Mrch. 
122. 
59. 
. 229 
Zonites, Beckianus Ad. . 
Benoiti Crs. F 
Bensoni Ad. T 
Bermudensis Bld. 
betieus Bgt. 
bilineatus P. 
Blauneri Bgt.  . 
Blidahensis Bgt. . 
Boissieri Bgt. 
Botterii Bgt. 
Bourguignatianus M. M. 
brumalis Mss. 
caducus Binn. 
camelinus Mss. 
ecaleulosa Ad. . . 
candidissimus M. T. 
capnodes Binn. 
caricus Roth. 
cariosulus Bgt. 
cariosus Bgt. . 
carnioliceus Sehm.. 
easea Scehmeltz. . 
catoleius Bgt. 
Cayennensis Dron. . 
cellarius Gr. 
cerinoideus Binn. 
chionodiseus Bgt. 
Chiron Gr. 
chloroticus Gr. 
eitrina Sws. 
Clymene Sh. 
coma Gr. 
compressus Zgl 
connectens Sh. 
contortulus Mss. 
conus Ád. . . 
Cookiana Sh. 
corax Ps&rr. 
Coresia Gr. 
Courquini Bgt. 
eressida Ad. . 
eroaticus Partsch. 
erypta Parr. 
erystallinus Mq. T. 
cultellatus Thoms. 
cycloplax Gr. 
cypricus Mss. 
deilus Bgt. 
Desmazuresi Crs. 
detecta Ad. 
diaphanus Mq. T. 
Dillwynianus Bgt. 
Durandoianus Bgt. . 
Dutaillyanus Mab. 
edentula Ad. . 
egena Ad. . 
