INDEX. 
129 
Nereis . 
Neritidae . 
Non - parasitic 
Worms . 
Nucleobranchiata . 
Nuculidse . 
Nudibranchia 
PAGE 
122 
13 
118 
22 
31 
,23,24 
OCTACNEMID^S . 
Octopus 
Oikopleura . 
Oligochaeta 
Olividae . 
Ophiacantha . 
Ophiuroidea . 
Opisthobranchia 
Orange Cowry. 
Oleaster 
Ormers . 
Ostreidae 
Ovuiidse 
Oyster . 
Panthalis . 
Paper-Nautilus 
Patella . . . 
Pearl- Oyster . 
Pearly Nautilus 
Pectinibranchia 
Pectinidse . 
Pedata . 
Pedicellinidae . 
Pelmatozoa 
Pentacrinus . J 
Periwinkle . 
Perophora . 
Phallusia . 
Pharyngodictyon 
Pholas . 
Phylactolaemata 
Piddocks . 
Pinna . 
Piscicola . 
Planaria 
Platylielmia . 
Pleurotomaria 
Pleurotomatidse 
Plumatella 
Polychseta . 
Polyclinidae 
Polyplacophora 
Polyzoa 
Pond-Mussel 
Pond-Snails 
Pontobdella 
Poromyidae . 
Poulp . . 
Proneomenia 
. 100 
.46,47 
. 104 
122, 124 
. 20 
. Ill 
112,114 
. 23 
15 
114 
12 
36 
15 
36 
123 
46 
9 
33 
50 
13 
38 
115 
73 
111 
1,113 
14 
95,96 
93 
98,99 
43 
70 
43 
33,34 
124 
118 
116 
11 
20 
71,72 
122 
96 
7 
54-73 
5 
27 
124 
45 
7 
7 
Protobranchia . 
Pseudolamellibran- 
chia . 
Psolus . 
Pterocera . 
Pteropoda . 
Pterotracheidse 
Pulmonata . 
Purpura 
Pyrosoma . 
Kadiolitidze 
Kazor-shells 
Retepora . 
Rhodosoma 
Rhopalaea . 
Rhynchonella 
River-Snails 
Rock-shells 
Round Worms 
Sabella 
Sabellaria . 
Saddle -Oysters 
Salpa . . 90 : 
Salpidae 
Scala . 
Scallops 
Scaphopoda 
Schizoporella . 
Scorpion-shells 
Screw-shells . 
Scrobiculariidae 
Scrupocellaria . 
Scutibranchia . 
Sea-Butterflies 
Sea- Cucumbers 
Sea-Hare . 
Sea-Lilies . 
Sea-Mat 
Sea-Mouse . 
Sea-Slugs -. 
Sea-Urchins 
Sea-Woodlice 
Selenariidae 
Semele . 
Sepia . 
Sepiola . 
Septibranchia 
Serpula . 
Ship- worm 
Silk Coralline 
Siphonariidse 
Sipunculus . 
Slipper-Limpets 
Slit-Limpets 
Slugs . . 
Snails . 
PAGE 
31 
33 
115 
18 
23 
22 
25-28 
20 
90,99 
41 
42 
65,66 
93,94 
96 
82 
13 
20 
118 
122 
122 
32 
100-103 
100 
17 
38 
28 
65 
18 
17 
40 
60,62 
9 
23 
106, 115 
23,24 
106 
54 
122 
106 
106, 114 
7 
64 
40 
46-48 
46 
45 
122 
43 
68 
26 
126 
14 
11 
28 
Solenidae . 
Solenomyidse 
Spatangus . 
Spirula 
Spondylidse 
Squid 
PAGE 
42 
31 
109 
49 
37 
46 
Stalked Crinoids 110, 112 
Starfishes . 
Stichopus . 
Streptoneura . . 
Strombidae . 
Strongylus 
Styelopsis 
Stylommafcophora . 
Synapta . . 107, 
108 
107 
9 
17 
120 
92 
27 
115 
T^3NIA . 
Tapeworm . 
Tectibranchia 
Tellina . . 
Terebella . 
Terebratula 
Terebratulina 
Terebridse . 
Teredo . 
Testacella . 
Tethys . . 
Thaliacea . 
Thecalia . 
Thecidium . 
Thecosomata 
Thorn - headed 
Worms . 
Thorny Oysters 
Thread- worms. 
Thysanozoon . 
Tooth -shells . 
Top-shells . 
Trematoda 
Trepang 
Trichina 
Trichocephalus 
Tridacnidae 
Trochetia . 
Trochidae . 
Trumpet-shells 
Tubifex . . 
Tubulipora 
Tunicata . 
Tun-shells . 
116,117 
116 
23 
40 
123 
74,82 
82 
21 
43,44 
28 
Turbellaria 116, 118, 120 
Turbinidae . 
Turritellidae 
Tylenchus . 
24 
100 
38 
81 
23 
122 
37 
118 
118 
28 
12 
116 
115 
121 
120 
41 
125 
12 
18 
124 
69,70 
83-105 
18 
12 
17 
122 
Umbsaculid^: . . 23, 24 
Umbraculum . . 24, 25 
Umbrella -shells . 23 
K 
