TIIK JURASSIC ->Y>TK.M 



439 



A" (/(/////<' /</( . ' . Ostn-adeltoidea, Thracia depressa, Astarte hartwellensip, 

 \. minim i, Diceras arietiuinn, Trigonia monilifera, 

 I'rotocardia striatula, Exogyra virgula. 

 ''info. Pleurotomaria reticulata (also Oxfordian and Corallian), 



Littorina pulcherrima, Harpagodes Oceani. 

 PnbphinotM hiplex, Per. mutabilis, Cardioceras 

 alternans, Keineckia eudoxus, Oppelia tenuilobata, 

 Stcneroceras calisto, Beleinniti-s nitidus. 



'In. Ichthyosaurus trigonus, Ich. entheciodon, Plesiosaurus 



trochanterius, Pliosaurus macromerus, Geosaurus 

 maximus. 



Fossils of the Portlandian 



Isustrea oblonga. 

 Waldlit'imia boloniensis. 

 "//,-,/ //(///</. I'rotocardia dissimilis, Cytherea rugosa, Perna myti- 

 loides, Pecten lamellosus, Trigouia gibbosa, Lucina 

 portlandica, Ostrea expansa, Aucella Pallasi. 

 ficstropoda. Ceritliiuni portlandicuni, Neritonia sinuosa, Natica 



elegans, Pleurotomaria rugata. 



Holcostephanns giganteus, Hoi. portlandicuni, Peri- 

 sjihinctes gigas, Per. boloniensis. 



Fossils of the Purbeck Beds 

 (Estuarine, Freshwater, and Terrestrial) 



Sequoia portlandica, Cycadeoidea nidiformis, C. micro- 



l>liylla, Chara Jaccardi. 

 Hemicidaris purbeckensis. 

 Cypridea purbeckensis, Cy. granulosa, Cy. punctata, 



Archseoniscus Edwardsi. 

 Corbula alata, Cyrena media, C. elongata, Ostrea dis- 



torta, Unio valdensis. 

 Pliysa Bristovi,' Viviparus carinifera, V. elongatus, 



Planorbis Fisheri, Melanopsis hurpa>formis. 

 Bupreston stygnus (a beetle), and many others. 

 Lfjiidotus minor, Hybodus striatus, Microdon radiatus, 



A>]iidorhynchus Fisheri. 

 Goniopholis, Tlieriosuchus, Xannosuchus (Crocodiles), 



Chelone and Pleurosternon (Turtles), and Dorato- 



rhynchus (a Pterodactyle). 

 See ante, p. 434. 



C>'/>/tfi/<>/><>(l<t. 



Ecltinodernia. 

 Crustacea. 



Latnellibranchia. 



<;>i*trt>poda. 



/ /. 

 Pisces. 



Heptilia. 

 Mammalia. 





( '. THE UPPER JURASHIC OF BRITAIN 



Geographical Range. The cliffs of the south coast near 

 Wi-ymouth and Portland expose good sections of all these rocks, but 

 the inland outcrop of the Portland and Purlx'ck Beds ia repeatedly 

 concealed by the overstep of the Cretaceous strata. They appear, 

 however, for a space near Tisbury in the Vale of Wai-dour, and 

 again near Devizea From Calne and Swindon their outcrop is 



