PAGE PAGE
Lomanotus vermiformis . 163 Platydoris scabra . 19
Lophocercidæ ") 62, 78, 79, 80 testudmaria, . 101
Lophocercus ) Pleurobranchidee . . - . 80, 89
Pleuroleura . . . . 7, 160
Madrella.................................... : 73 Pleurophyllidia Lineata . 160
Marionia . . . 3,7, 8, 13, 86, 146 lo v e n i ................................ . I l l , 160
Mediterranean fauna . . 8,9 miilleri . . . . . 160
Melibe . . . . 20, 71 undulata . . ' '. . 160
Miamira . . . . . 3 Pleurophyllidiidee 70, 71, 87, 88
Migrations . . . . . 19 Plocamopherus. . . . .. 19
Mucus . . . . . . 24 P o ly c era .................................... . 3
Mucus gland (Doris) 46, 47, 48, 49 quadrilineata 49, 154
(Æolidia) . . . : . .• 56, 57, 58 Polycerella . 8
Muscles (Doris) - 39, 44 Polyceridse . . . . 65
. (Æolidia) . . . . 51 ' Pontolimax . . . . 78
Myrrhine.................................... . 75 Portuguese fauna 7
Proctonotus mucroniferus. . 165
Nematocysts . . . 24, 25, 53 Protective coloration . | 21
Nervous system (Doris) 40, 41 Pseudodorididee . . . 65 66, 154—157
(Æolidia) . . . . 53, 91 Pseudovermis . . . . . 34
Newnesia . . . . . 78 Pteropods.................................... 60, 61
Notæolidia . . . . 11
Notodorididæ . 65, 151 Radula (variation in) . 4, 79
Nudibrancbiata (definition) . 60 of Doris . . . 38
Nymphon parasiticum . 26 of iEolidia 51, 90
of S olids . . . . 73, 74
OEsôphagus (Doris) . . 39 Renal system (Doris) 45
(Æolidia) . . . . . 52 (.TEolidia) . . . . . 55
Oncidium . . . . . . 61 Reproductive system (Doris) 46—49
Opisthobranchiata . 60 (.dLolidia) . . . . 56—59
Oviposition . . . . 28, 29 Respiration (Doris) . 41—45
(jEolidia) . . . . 54,155'.
Pacific fauna . . . . . 12 Rhinophores, 41, 50; perfoliation of . 83
Pacific and Atlantic, species common to 12, 13 Rizzolia peregrina . . 31_
Palio lessonii- . . . 154 Rostanga coccinea 5, 149
ocellata . . . . . 154
Parasites . . . 25—26 Scandinavian fauna . 6
Pelagic forms........................................ 14, 19 Scyllaaa | . 71, 72
Pelseneer’s classification . • . . I 62 pelagica . . . . . 164
Pericardium (Doris) . . 44 Scyllaeidaa . . . . . 72, 164
(Æolidia) . . . . . . : .. _ 55 ' Senses .................................... • 27
Phanerobrancbiatæ . 64—66, 86 Serratas . 1. 74, 75
Phyllidiidæ . . . . . 68 Shell, reduction and disappearance 81, 82, 90
Phylliroe.................................... . 71 larval . . . . . 31
Placida . . . 176 S p a w n .................................... 27, 28
Phyllobranchidæ . 76 Spermatic groove . . . 91
Platydoris . . . . . 7, 9, 67 Spermatocyst . . . 47
planata . . . 101 Spermatotheca . . . . 47, 57
Spurilla . .
PAGE
. 59
Staurodoris .3 , 95
maculata . 98—99, 147
verrucosa . . 96—98, 147
Stiliger bellulus . 136, 177
mariee . 136, 177
Stomach (Doris) . . 39
(^olidiafe\i-f;. ^ . 52
Stomach plates . . . . 9 0
Swimming . .19
Symmetry . . . 33
Sympathetic nervous system . 41
Tectibranchiata (defined) . . 61
Tergipes . . . . . 30, 33, 34
bullifer . 1 7 1
claviger . 170
despectus . 25, 170
Tethys (name), 15, 16; (nudib ranch) 71,72
Thecacera capitata . . 153
maculata . . 153
pennigera . . . . . . 1 5 3
virescens . . 153
Thordisa duthia . . 107
Thuridilla. . . . . 77
Titiscania .
PAGE
81
Torsion . 81
Triauly 58, 59
Triopa 3
clavigera . . 22, 152
Triopella incisa . 151
Triseriatæ 73, 75, 167
Tritonia . . 20, 63, 89, 90
alba . . . . . 93, 146
hombergii . . 146
lineata . 146
plebeia . 146
psoloides . . 146
Tritonidoxa 64
Tritoniella . 64
Tritoniidæ . 85
Tritoniopsis . 11
Uniseriatæ ■ . 74, 75, 170
Variation'. . 3—6, 82
Veliger 31—34
Warning coloration . :. . ' . . 21