Xli Illustrations 
PAGE 
POOCUMICIOI I FUCCO a eee ee Pe a 267 
Teeth of Potadoma ponthiervillensis spoliata; operculum ot Potadoma liricincta 
DOLE ise ee) oe aay ace a ee a es ON Oe 272 
Potadoma graptoconus and Potadoma schontedeni: sculpture................... 247 
Potadoma medjeorum: type and paratype. Potadoma tornata: copy of original 
PU ia eta es i eS 283 
Anklet worn by children of the Medje tribe... ........5 fc: 22 eee ses 284 
Meer on Cleopatra buliwordes. 4. ee re 289 
Cleopatra langi: type and paratypes, from Stanleyville... ees ie DOS 
Cleopatra langi, young, and Cleopatra cara, type from Bi apkewille. Bee ek . 294 
Cleopatra dautzenbergi, type; Cleopatra nsendweensis from Panda River; and 
CleOpuiid Tisena Ween s ROMONGONG 22. oe. 8 a es os 295 
Opercula of Limnotrochus es Paramelania damoni, and hangers za grandis 299 
Teeth of Paramelania damoni. . a i a 800 
Weeth oF Vanganiyecia (Ujena 3. ee a ee ee 302 
Tanganyicia, from Tembwe, and Tanganyicia rufofilosa, from Moliro......... 303 
miaieya nemiunodes: trom Lembwe Bay..2)0..0025500 een. ..: 308 
PCP EU CONC a A ga El Sg ccs ess 310 
Oe GRO Ae ee a ces... al? 
a cg eo 315 
Oe a ee ae os 316 
Limnotrochus thomsoni and Chytra kirkti............. ee Oe a B18 
Paramelania damoni and Paramelania devon Pepedtien eee 2 B20 
Foramelania (Bythoceras) wridescens from Kilewa....<.......20...:..600..-... 322 
morgena coronate aud Lovigerta grandis) 22. 2. ee ke oe 320 
Edgaria giraudi locardiana; Edgaria nassa; and Edgaria paucicostata........... 329 
POPC IG Mono i a oe sk 336 
Corbicula radiata: from Kachiobwe; exterior and interior view of valves...... 341 
Corbicua ragsatas ion Nilewiid White Nile.) ....¢. 2.22... ak oe ee. 342 
Corbicula radiata edwardi: type. Corbicula tanganyicensis................... 343 
Premium siinimanni. views of valves)... ee ee ee «B49 
CO) HOW es ee eo i ee se ees 2. 351 
TOC ui Nevimesuin. WilWs Gl VAIVEs 4.02... ...2. 0... ee ee, 352 
Pisidium katangense: right valve of type............ Phd BGS 
Eupera mediafricana: Stanleyville; series shorn vadaticnp in ee oe 306 
Eupera mediafricana, from Stanleyville, and Eupera mediafricana etheriarum, 
PVG ei a eee oh) ca oy atin wo... gor 
Egeria congica: young shells. . Psa ae ee eee oy, .. 364 
Egeria nux: radially iommuaicd a Ce he er, Ok SS ee 367 
Iphigenia congo: type, from Malela.. Pe hee ee i ees. | 378 
Cyrenoida senegalensis: from Banana: “ae er ee ee e- S76 
Cyrenoida rosea brevidentata: type, Hon Pare Dee a ee ents sy , 377 
Parreysia leopoldvillensis: hinge teeth of specimens from Zambi and Stanleyville 391 
PeareyG copa n ior. Wom Fambl................ oe. he ch ks. 392 
Grandidieria burtoni: foe Taran | ea te eM hi ey BOR 
Celatura egyptica: from the Nile. . ieee eee ed. 406 
Pseudavicula johnstoni: from boar i@a Tighe Meera. Rete ce aE ial 409, 
