HOPKINS CAMBRIDGE ESSAYS : GEOLOGY. 
51S 
Sponges — many varieties 
Siphonia, sp. 
Bolemnites I?,nceolatus (?) 
Pectinos, sj). — rare 
Ammonites— very large, rare 
Nautilus elegans — rare 
expansus 
Sponges, species of 
Terebratula, sp. — abundant 
Exogyra, sp. 
Lima — two species or more 
Wood — several kinds 
Serpula — several species 
Hamites — three species 
Echinus, (?) species of 
Spatangus, (?) sp. 
Ammonites rostratus? 
Ammonites, other species of 
Nautilus, sp. 
Millepora, species of 
Gryphaja, sp. 
Inoceramus (?), sp. 
Serpula — three species 
Lima — two or three species 
Crustacean remains 
Fish-teeth and scales — abundant 
Sharks' teeth and bones — rare 
Alcyonia, sp. 
Sponges, species of 
Siphonia, sp. 
Pecten quinque-costatus 
„ dequicostatus 
Other species 
Spondylus, sp. 
Casts of species of Venus (?), Thetis, 
T. carinata, and two other species or i 
two varieties, and Masandrina (?). 
i AND Sandstonk Beds. 
Natica, sp. 
Spines of iish 
Hypsodon Lewesiensis, in British 
Museum, discovered by the author 
Pleurotomaria, sp. 
Sharks' teeth and bones, several spe- 
cies of 
Fish-bones 
Ammonites — three or four species 
Nautilus, sp. 
Ostrea carinata 
Fusus (?), sp. 
Astacus (? ), sp. 
Mya — two species 
Gervillia — two species 
Modiola, sp. 
Malm -BED. 
Ostrea vesicularis 
Anomia (?) sp. 
Inoceramus, large sp. 
Pinna, sp. 
Hamites — large sp, 
Cardium — several species 
Trigonia aliformis 
Panopma mandibula 
plicata 
three other species of 
Acta3on, or Tornatella — several species 
Wood, fragments of 
Belemnites minimus (?) 
Pleurotomaria — two species 
Natica sp. 
Scalaria (?) sp. 
Terebratula — three or four species 
Coprolites, 
Tellina (?), Cytherea, of Trigonia spinosa, 
arieties, and of Mya, Modiola, Rostellaria 
THE SPIEIT OE GOOD BOOKS. 
CAMBRIDGE ESSAYS, 1857.— GEOLOGY : BY W. HOPKINS, 
M.A.,E.Il.S., F.G.S. 
{Co?itinuedfrom p. 425.) 
In the preceding exposition the object has been to give, in a condensed 
form, the leading facts and conclusions of geology. These facts are so 
firmly established by observation, and the conclusions from them so 
clearly demonstrated, that every rational mind must assent aud be pre- 
pared to admit the principle on which Geology, like all physical sciences, 
