coscinoides, 870.
cristata, 869.
ensiformis, 869.
fenestrata, 869.
haliommidium, 871.
lacunaria, 869.
loculata, 869.
mülleri, 871.
orthopora, 870,
polypora, 870.
quadratura, 871.
tabulata, 871.
Phatnasplenium, 870.
Phlebarachnium, 1295.
facetum, 1296.
setosum, 1296.
venosum, 1297.
Phœnicosphæra, 75.
Phormobotrys, 1124.
cannothalamia, 1125.
hexathalamia, 1125.
pentathalamia, 1124.
polythalamia, 1125.
trithalamia, 1124.
Phormocampe, 1456.
campanula, 1456.
conus, 1458.
eucalyptra, 1457.
lamprocyclas, 1457.
metalis, 1457.
mitra, 1458.
Phormocampida, 1453.
Phormocyrtida, 1365.
Phormocyrtis, 1368.
carinata, 1368.
costata, 1369.
embolum, 1369.
fastosa, 1369.
longicornis, 1370.
quadrata, 1369.
Phormosphæra, 61.
Phormospyrida, 1084.
Phormospyris, 1076.
tricostata, 1087.
tridentata, 1087.
trifoliata, 1087.
Phorticida, 708.
Phorticium, 709.
abnorme, 710.
deforme, 710.
pylonium, 709.
spironium, 709.
Phortolarcus, 710.
Phortopyle, 709.
Phractacantha, 755.
bifurca, 755.
bipennis, 755.
Phractacanthida, 753.
Phractasparium, 808.
Phractaspida, 808.
Phractaspidium, 810.
Phractaspis, 809.
bipennis, 809.
cataphracta, 810.
complanata, 809.
condylophora, 809.
constricta, 810.
prototypus, 809.
Phractasplenium, 809.
bipenne, 809.
Phractopelta, 852.
aspidomma, 854.
dorataspis, 852.
diporaspis, 852.
dyadopora, 852.
haliomma, 854.
hexadopora, 853.
hystrix, 854.
octadopora, 853.
tessaraspis, 853.
tessaromma, 854.
tetradopora, 853.
Phractopeltida, 847.
Phrenocodon, 1433.
clathrostomium, 1434.
diaphragma, 1434.
Phyllostaurus, 744.
Physematium, 34.
atlanticum, 35.
mülleri, 35.
Pilocyrtida, 1129.
Pipetta, 337.
conus, 338.
fusus, 337.
salpinx, 338.
tuba, 337.
Pipettaria, 339.
fusaria, 339.
tubaria, 339.
Pipettella, 304.
elongata, 305.
fusiformis, 304.
prismatica, 305.
tubulosa, 305.
Pityomma, 259.
drymodes, 260.
piniferum, 260.
scoparium, 259.
Plagiacantha, 909.
abietina, 910.
arachnoides, 910.
dodecantha, 910.
elatine, 911.
furcata, 910.
verticillata, 910.
Plagiacanthida, 898.
Plagiocarpa, 914.
procortina, 914.
procyrtella, 914.
Plagonida, 906.
Plagonidium, 913.
bigeminum, 913.
quadrigeminum, 914.
Plagoniscus, 912.
cortinaris, 913.
euscenium, 912.
nassellaris, 913.
tripodiscus, 912.
Plagonium, 916.
arborescens, 917.
distriactis, 917.
lampoxanthium, 907.
sphærozoum, 916.
trigeminum, 917.
Platybursa, 1051.
compressa, 1051.
Platycryphalus, 1298.
sethodiscus, 1298.
Plectanida, 919.
Plectaniscus, 924.
archiscenium, 925.
cladoscenium, 925.
clathrocorys, 925.
cortiniscus, 925.
tripodiscus, 925.
Plectanium, 928.
ovodimare, 928.
sphærozoum, 928.
trigeminum, 928.
Plectellaria, 895.
Plectida, 898.
Plectocoronis, 979.
anacantha, 979.
pentacantha, 979.
triacantha, 979.
Plectoidea, 898.
Plectophora, 922.
arachnoides, 922.
novena, 923.
pyramidalis, 923.
triomma, 922.
Plectopyramis, 1256.
dodecomma, 1258.
fenestrata, 1259.
furcata, 1259.
heteromma, 1259.
hexapleura, 1257.
lagena, 1260.
magnifica, 1257.
polygonomma, 1258.
polypleura, 1260.
quadratomma, 1258.
serrata, 1259.
spongiosa, 1261.
trapezomma, 1258.
Plegmosphæra, 87.
cœlopila, 88.
entodictyon, 88.
exodictyon, 89.
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THE VOYAGE OF THE H.M.S. CHALLENGER.
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