CONTENTS. 
XXXI 
ECHINODERMATA. By F. Jeffrey Bell, M.A , &c. 
Page 
Titles 1 
Distribution ... 3 
General Morphology 3 
Page 
Echinoidea .... 4 
Asteroidea .... 5 
Ophiuroidea ... G 
Page 
Holothurioidea . , 7 
Crinoidea 7 
CCELENTERATA. - 
Hydrozoa and Ctenopiiora. By A. G. Bourne, B.Sc. (Lond.), &c. 
Page 
Titles 1 
Hydromedusae — 
Gymnoblastea-Anthomedusae 4 
Calyptoblastea-Leptomedusae 5 
Trachomedusae 7 
Page 
(Hydromedusae) Siphonophora. 7 
Graptolites 7 
Scyphomedusae — 
Cubomedusae 7 
Discomedusae 7 
Antiiozoa. By S. J. Hickson, D.Sc. (Lond.), B.A., &c. 
Titles 7 Octactiniae 15 
Poly actiniae 13 Rugosa 16 
Madreporaria 13 
SPONGIiE. By Prof. W. J. Sollas, D.Sc., F.R.S.E., F.G.S. 
List of W orks on Recent Sponges 1 
„ „ Fossil „ 3 
Recent Sponges 4 
Anatomy, Physiology, &c. . 4 
Classification G 
New Genera and Species . . 8 
Distribution 9 
Fossil Sponges 10 
Anatomy, &c 10 
Now Genera and Species . . 10 
PROTOZOA. By Prof. Alfred C. Haddon, M.A., M.R.I.A., F.Z.S. 
Page 
The General Subject 1 
Physiology 3 
Palaeontology .... 4 
Page 
Monera 5 
Rhizopoda 5 
Flagellata 7 
Page 
Ciliata .... . . 11 
Gregarinida .... 13 
Index to Genera and Subgenera described as New, &c. 
