LIST OF ILLUSTRATIONS. 



XI 



Plagiostoma giganteum, 259 

 Platycrinus trigintidactylus, 119 

 Pleurtomaria carinata, 249 

 Polypora, 216 



tuberculata, 217 



Posidonomya, 248 



Poteriocrinus, head of, 122 ; stem 



of, 123 



Prestwichia, 178 

 Productus giganteus, 224 



horridus, 230 



punctata, 229 



scabriculus, 230 



Protaster Miltoni, 134 

 Pterinea subfalcata, 244 

 Purpura lapillus, 282 

 Purpura tetragona, 290 



R 



Radiolarian, 33 



Retepora, 216 



Rhodocrinus, 120 



Rhynchonella pleurodon, 228, 229 



pugnus, 226 



Roots of encrinites, 120 

 Rostellaria Parkinsonii. 270 



Sabella unispira, 163 

 Salenia, 152 

 Scaphites aqualis, 318 

 Scrolls Fabricii, 193 

 Sertularia abietina, 41, 42 



fusca, 36 



Sessile barnacle, 203 



Shell of ammonite (section of), 37i 



309 



Shells of recent cuttle-fish, 304 

 Shrimp parasite, 182 



Siphonia pyriformis, 20 

 Smilotrochus granulatus, 94 

 Spicules of recent sponges, 7 ; 



fossil, 8, 9 

 Spirifer, coils of, 227 



cuspidatus, 228 



speciosus, 227 



striata, 228 



trigonalis, 227 



Spondylus spinosa, 269 

 Sponge imbedded in flint nodule, 2 1 

 Stalked barnacle, 203 

 Stenopora fibrosa, 77 

 Stromatopora concentrica, 15 

 Strophomena depressa, 226 



rugosa, 226 



Syringopora ramulosa, 59 



Taxocrinus, 118 

 Tellina crassa, 283 

 Tentaculites annulatus, 164 

 Terebratula biplicata, 234 



caput-serpentis, 237 



deformis, 236 



dorsata, 236, 237 



hastata, 228 



recent species of, 237 



showing loop, 237 



Teredo tubes, 273 

 Thecosmilia annularis, 93 

 Trigonia costata, 255 ; recent, 256 

 Trinucleus fimbriatus, 180 



Lloydi, 191 



Trochus, 281 



Trophon contrarius, 281 



Turritella, 275 



granulata, 269 



Turrilites, 303, 318 

 Bergerii, 319 



