414
TAXONOMIC INDEX
Tylocephalum-continued
pingue, 256
unionijactor, 256
U
Unionicola
fossulata, 45
ypsilophorus, 48
var. haldemani, 47
cinerea, 12, 111, 245
Urosalpinx
V
Vahlkamjla
calkelzsi, 142, 143-145, 147, 338
patuxent, 129, 142, 143, 145-147, 338
Vampyrellidae, 142
Vannella, 143
Velacumantus awtralis, 128
Venerupis
(= Paphia) staminea, 291
philippinarum, 12, 135, 270
semidecussatus, 135
staminea, 103,254, 259,260, 261, 344
V e n w , 214, 344
exoleta, 262
Venus-continued
fasciata, 186, 344
gallina, 184, 344
mercenuria, 94, 238
see Mercenaria
praeparca, 262
Vivipara quadrata, 24
viviparus malleatus, 57, 75, 76
Volsella, 279
Vulpanser tadorna, 220
X
Xanthidae, 335
Y
Yoldia cooper;, 262
Z
Zanclea costata, 21
Zeugorchis acanthus, 243
Zirfaea crispata, 194
Zizyphinus zizyphinus, 287
Zoochlorella, 6
Zoogonoides laevis, 34
Zoogonus rubellus, 105
Zoomastigophorea, 138, 342