XXIV 
CONTENTS. 
Ortiioptera. By R. McLaciilan, F.R.S., F.L.S., &c. 
Page 
The General Sub- 
ject 216 
Forficulidje .... 217 
Page 
Blattidas 217 
MantidaF; 217 
Phasmatidoe. . . . 218 
Page 
Gryllidie 218 
Locustidas .... 218 
Acridiidae .... 219 
Rhynciiota. By W. F. Kirby, M.E.S., &c. 
General Subject . 223 
Hemiptera — He- 
teroptera .... 224 
Pentatomidae . . . 224 
Coreidae 227 
Lygaeidae 228 
Pyrrbocoridao . . 228 
Tingididae .... 228 
Aradidae 228 
Capsidae 229 
VERMES. By 
General Notes . 1 
Platyhelminthes . 1 
Nematolielminthes 6 
Anthocoridae . . . 230 
Saldidae 230 
Nabidae 230 
Reduviidae .... 230 
Hydrometridae . . 231 
NepidaB 231 
Notonectidae . . . 231 
Corisidao ..... 231 
Hemiptera — ITo- 
moptera .... 231 
F. Jeffrey Bell, M.A., 
Acanthocephali . . 8 
Rotatoria 8 
Gephyrea 9 
Cicadidae 231 
Cercopidae .... 232 
Fulgoridae .... 232 
Membracidae . . . 232 
lassidae 232 
Psyllidae 234 
Apliididao 234 
Coccida? 237 
Aleurodidas .... 238 
Auoplura 238 
F.R.M.S., F.Z.S. 
Chaetognatha . . . 10 
Annulata 11 
Orthonectida . . 15 
ECHINODERMATA. 
Titles 1 
General Morpho- 
logy 3 
By F. Jeffrey Bell, 
Echinoidea .... 5 
Asteroidea .... 7 
Ophiuroidea ... 8 
M.A., F.R.M.S., F.Z.S. 
Ilolothuroidea . , 9 
Crinoidea 11 
CCELENTERATA. 
Hydrozoa and Ctenophora. 
Titles ] 
Hydromedusaa 
Gymnoblastea- Anthomedusas . 7 
Calyptoblastea-Leptomedusae . 8 
Trachomedusae 8 
NarcomedusaB 8 
Hydrocorallinae 8 
By A. G. Bourne, B.Sc. (Lond.). 
Ctenophorao (Esch.) 
Cydippidao 9 
Lobatao 9 
StauromednsaB (Hasck.) .... 9 
Peromedusae (HaBck.) 10 
CubomedusaB (Hasck.) 10 
Discomedusae (Haeck.) 11 
Antiiozoa. By S. J. Hickson, B.Sc. (Lond.), &c. 
Titles . 14 I OctactiniaB 22 
HexactiniaB 18 | 
SPONGIIDA. By Stuart O. 
Chief W orks on Recent Sponges 1 
Classifications 2 
Faunas 3 
Genera, Species, &c. , referred to 4 
Ridley, M.A., F.L.S., F.R.M.S. 
New Genera and Species ... 11 
General Anatomy and Physi- 
ology 19 
Fossil Sponges 20 
PROTOZOA. By Stuart O. Ridley, M.A., F.L.S., F.R.M.S. 
The General Subject 1 I Rhizopoda 6 1 Flagellata, Monads 17 
Infusoria 3 | Fossil Rhizopoda 14 | Gregarinida ... 22 
Index to Genera and Subgenera described as New, &c. 
