Xx. CONTENTS 
(Gasteropoda Rostrifera, cont.) PAGE. 
VerMETIDE. (Tablets 1476—1513.) 
Siphonium ... a 301 
Aletes ey ae 301 
Vermetus.... e 303 
Bivonia ey i 305 
Petaloconchus 308 
Cauctpm. (Tablets 1514—1551. ) 
Cecum 312 
TURRITELLID. (Tablets 1552—157 4,) 
Turritella ... ze 330, 552 
CreritHiaD&. (Tablets 1575—14537.) 
Cerithium _... ee 333 
Vertagus nt a 339 
Triforis Ad ot 340 
Cerithidea so oe 342 
Lrrorinipm. (Tablets 1638—1703. ) 
Litorina oe = 346 
Modulus a ee Sol 552 
F ees he z 353 
Isap 309 
ices ” (Lablets 1704—1715. ) 
Rissoina a 356 
Barleeia eS ee atite Ray 
Alvania ay me 359 
Cingula ty ey 360 
Hydrobia _... ne 360 
JEFFREYSIADE. (TZablets 1716—1720.) 
Jeffreysia (Rissoella) ... 361 
TRUNCATELLIDA. (Tablet 1721.) 
Truneatella ... _ 364, 
Pranaxipe (Tablets 1722—1732.) 
Planaxis me oe 364. 
Alaba ... a he 365 
Ovutips. (Tablet 1733.) 
Ovula (Radius) ... 370 
Crpreipm. (Tablets 1734—1812. ¥ 
Cypreea 371 
Luponia ... oe 373 
Aricia ‘op: ee 373 
Trivia J 375 
CANCELLARIADE. (Tablets oe 
Cancellaria 380 
Strompipm. (Tablets 1821— ~1827 4) 
Strombus 381 
