ILLtrSTRATIONS. 



XI 



PAGE 



Modiola granollratu., n.sp. ......... 201 



Pseudodon ponderosa d,nd Macrochlamijs rex, w.fi^'p. (Plate VIII.) . 202 



Oliva Brettinghami, n.sp. . . . . . . . . . 203 



Garelia Pilshryi, n.sp. . . . . . . . . . 204 



Radula3 of British Helicids 211 



New species of /'^ec/ojo^/^iA' from Tonkin. (Plate IX. ) . . . 218 



Right valves of some forms of Venerida;. (Plate X.) . . . 246 



Mollusca from New Zealand. (Plate XI.) . . ... . 265 



Diagrammatic Sections of Nautiloid Shells 278 



Oliva Andamanensis, n.sp. ........ 287 



Cyprwa tigris, radula .......... 291 



Cyprma tigris, anatomy. (Plate XII.) ...... 291 



Trivia arctica, pedal ganglia. (Plate XII.) ..... 291 



Cyprcea arahica, pedal ganglia. (Plate XII.) ..... 291 



Trivia, radula ........... 292 



T'rma arcil/ea, sections of pedal ganglia. (Plate XIII.) . . . 298 



Pomatias Harmeri, n.sp. . . . . . . . . . 316 



Fossil Pearl-growths. (Plate XIV.) 320 



y| i/;ora6'o/»/;or?<s of New Zealand ....... 321 



Atlioracophorus bitentacidatus, var. rufovenosus ..... 322 



„ „ „ radula . . .323 



„ „ „ genitalia . . . 323 



A thoracopliorus giganteus, n.sp. ....... 326 



„ „ radula ....... 327 



„ „ genitalia ....... 327 



Ampullaria Da Costce, n.sp. ........ 360 



Ampullaria avellana, n.sp. ........ 360 



Ampullaria interritpta, n.sp. . . . . . . . . 361 



Ampullaria levior, n.sp. . . . . . . . . . 362 



Leptodontarion Perakensis, n.sp. ....... 366 



Sitalai^l) Gunongensis, n.sp. ........ 366 



Sistrum Andreiosi, n.sp. ......... 369 



Plesiotrochus Fischeri, n.sp. ........ 370 



Kaliella cruda, n.sp. . . . . . . . . . .371 



Triphora triticea. Pease ......... 371 



Leptothyra crassilirata, n.sp. ........ 377 



Oihhula Dacostana, n.sp. . . . 377 



Oihhida tenuilirata, n.sp. ......... 378 



Minolia cAnerea, n.sp. ......... 378 



British Helicids, dentition 384- 



