xiv LIST OF ILLUSTBATIONS 



FIG. PAGE 



120. Terebella REMOVED FROM ITS TUBE . . , . 183 



121. A TUBE OF Serpula ATTACHED TO A SHELL . . . 185 



122. Serpula REMOVED FROM ITS TUBE . ... 186 



123. THE SEA MAT (Flustra) . . . . . .187 



124. Flustra IN ITS CELL, MAGNIFIED . . . . 188 



125. SEA SQUIRT ........ 189 



126. LAHVE OF MOLLUSCS . . . . . . 191 



127. SHELL OF THE PRICKLY COCKLE (Cardium aculeatum) SHOWING 



UMBO AND HINGE ; ALSO THE INTERIOR SHOWING THE TEETH 192 



128. INTERIOR OF BIVALVE SHELL, SHOWING MUSCULAR SCARS AND 



PALLIAL LINE . . . . . . . 193 



129. DIAGRAM OF THE ANATOMY OF A LAMELLIBHANCH . . . 194 



130. Mytilus edulis, WITH BYSSUS . . . . . 195 



131. A BIVALVE SHELL (Tapes virgineana) .... 196 



132. Pholas dactylus ........ 199 



133. INTERIOR OF VALVE; AND Pholadidea WITH 

 ANIMAL ........ 201 



134. THE SHIP WORM ........ 202 



135. 1. Teredo navalis. 2. Teredo norvegica .... 202 



136. Gastrochcena modiolina , . . . . . 203 



137. 1. Thracia phaseolina. 2. Thracia pubescens, SHOWING PALLIAL 



LINE ......... 204 



138. 1. Mi/a truncata. 2. INTERIOR OF SHELL. 8. Mya arenaria. 



4. Corbula nucleus . , . . . . 205 



139. Solen siliqua ........ 206 



140. 1. Solen ensis. 2. Cerati-solen legumen. 3. Solecurtus candidus 207 



141. Tellinidce ......... 208 



142. 1. Lutraria elliptica. 2. PART OF THE HINGE OF Lutraria, 



SHOWING THE CARTILAGE PIT. 3. Macra stultorum. 4. IN- 

 TERIOR OF SAME SHOWING PALLIAL LlNE . . . 210 



143. Veneridce ......... 211 



144. Cyprinidte ........ 213 



145. Galeomma Turtoni . . . . . . 214 



146. 1. Cardium pygmceum. 2. Cardium fasciatum. 3. Cardium 



rusticum ........ 215 



147. Cardium aculeatum . . . . . . . 215 



148. Pectunculus glycimeris, WITH PORTION OF VALVE SHOWING TEETH, 



AND Area tetragona ...... 216 



149. Mytilus edulis . . . . . . . . 217 



150. 1. Modiola modiolus. 2. Modiola tulipa. S. Crenella discors . 218 



151. Dreissena polymorpha ....... 219 



152. Avicula, AND Pinna pectinata . . . . . 220 



153. 1. Anomia epJiippium. 2. Pecten tigris. 3. Pecten, ANIMAL IN 



SHELL ........ 222 



154. Terebratulina. THE UPPER FIGURE REPRESENTS THE INTERIOR 



OF THE DORSAL VALVE , . 224 



