CONTENTS. 



XIX 



Family XIV. — Columellidce 



Page 

 - 245 



112. Columbella 



- 245 



113. Mitra 



- 246 



114. Voluta - 



- 247 



115. Melo 



- 249 



no. v^yniDci - 





117. Marginella 



- 250 



118. Volvaria - 



- 251 



Family XV. — Convolutidce - 



- 251 



119. Cypraea - 



- 252 



120. Erato 



- 255 



121. Ovula 



- 255 



122. Terebellum 



- 256 



123. Ancillaria 





124. Oliva 



- 257 



125. Conus - 



- 258 



Order IV. — Cephalopoda 



- 260 



Division I. — Polythalama 



- 263 



126. Belemnites 



- 263 



127. Orthoceras 



- 264 



128. Spirula 



- 264 



129. Nummulites 



- 265 



130. Nautilus - 



- 265 



131. Ammonites 





132. Turrilites 



- 268 



133. Baculites 



- 269 



Division II. — Monothalama 



- 269 



134. Argonauta 



- 269 



Division III.— No external shell 



- 272 



135. Octopus 



- 272 



