ILLUSTRATIONS. XI 



PAGE 



Nautilus rotimdatus, n.sp 132 



JVautilus suhrotundus, n.sp 134 



Nautilus semiornatus,ia..^Y} 136,137 



Nautilus exigitus, n.sp 138 



AnaXomj oi Adeorbis. (Plate VIII.) 146 



Anatomy of the genus Maricella, Gray. (Plate IX.) 155 



Genitalia of Ariunculus Attstriacus, n.sp 157 



New Ceylon Land-Shells. (Plate X.) 161 



Sections of Holocene and Pleistocene deposits at Buckland, Dover 162, 163 



Hygroriiia ruhiginosa (Schmidt) . . , 192 



Paludestrina Reevei, n.s^., &ndi P. ohtusa, ^a.n'Sb 198 



Valvatella Beringensis, n.sp., and V. albolineata, n.sp 206 



Marginella Walkeri, n.sp., M. Batidinensis, n.sp., and Astele 



stenomphala, n.sp 208 



Tridacna obesa, n.sTp. 210,211 



New Land-Shells from the Malay Archipelago. (Plate XL) . . . . 219 

 Mitra Buryi, n.sp., M. dilectissima, n.sp., M. Oeorgii, n.sp., Nassa 



Zailensis, Sby., var. Andamanica^ n.var. 222 



Natica strongyla, Melv. (typical form and var Andamanica, n.var.) 226 



Donovania minima (Mont.) : animal, operculum, and radula . . . . 238 



Portions of anatomy of Trachycystis, Dorcasia, and Isomeria . . . . 265 



Non-Marine Shells from the Hawaiian Islands. (Plate XII.) . . . . 274 



Non-Marine Shells from the Hawaiian Islands. (Plate XIII.) . . 275 



Non-Marine Shells from the Hawaiian Islands. (Plate XIV.) . . 276 



Dinoplax fossus, n.sp., and Chiton Crawfordi, n.sp 278 



Ariophanta Dalyi {A. cysis, var.) , . . 282 



Hemiplecta Floiveri, n.sp 284 



New Land-Shells from New Zealand. (Plate XV.) . . 291 



Nassa subconstricta, n.sp 301 



Streptaxis poliius, n.sp., >S^. elo7igatus, n.sp., and Amphidromus 



Dautzenbergi, n.sp 302 



Two new species of Rhodea, and sections of R. gigantea 305 



Papuina chilochroa, n.sp. 306 



Planispira Buruensis, n.sp., and Omphalotropis Hercules, n.sp. . . 307 



Aperture and epiphragm of J. c/ia^2-'?ia mmac^iZaia 309 



Marine Shells from North-west Australia 313 



Unio Pahangensis, n.sp 315 



Portion of nervous system of Ampullaria. sp 318 



New Zealand MoUusca. (Plate XVI.) . . 320 



Genitalia, radula, etc., of Medyla insculpta (Pfr.) , . . 331 



