200 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [NoV. 21, 



EXPLANATION OF THE PLATES. 

 Plate XIV. to Plate XIX. Fossils from the Hippurite limestone. 



PLATE XIV. 



Fig. 1. Area Olisiponensis. Fig. 3. Cardium eorrugatum. 



Fig. 2. Artemis elegantula. Fig. 4. Cardium Olisiponense. 



PLATE XV. 



Fig. 1. Cyprina globosa. Fig. 3. Diceras Favri. 



Fig. 2. Cyprina cordata. 



PLATE XVI. 



Fig. 1 to 3. Caprinula Boissyi. 



PLATE XVII. 

 Fig. 1 & 2. Caprinula brevis. Fig. 3 & 4. Caprinula Doublieri. 



PLATE XVIII. 



Fig. 1 & 2. Caprinula d'Orbignii. Fig. 4. Perna fragilis. 



Fig. 3. Avicula Olisiponensis. 



PLATE XIX. 

 Fig. 1 & 2. Exogyra Olisiponensis. Fig. 3. Pecten inconstans. 



PLATE XX. 



Fossils from the upper division of the Subcretaceous series. 



Fig. 1. Rostellaria Costae. Fig. 6. Turritella Cintrana. 



Fig. 2. Corbula Costae. Fig. 7. Turbo Mundae. 



Fig. 3. Artemis inelegans. Fig. 8. Pyramidella sagittata. 



Fig. 4. Ostraea praelonga. Fig. 9. Diceras Favri. 

 Fig. 5. Terebra obconica. 



Plates XXI. to XXIV. Fossils from the lower division of the Subcretaceous series. 



PLATE XXI. 



Fig. 1. Tellina Sobralensis. Fig. 3. Artemis cordata. 



Fig. 2. Corbula Edwardi. Fig. 4 & 5. Astarte discus. 



PLATE XXII. 



Fig. 1 to 3. Cyprina securiformis. Fig. 5. Mytilus Morrisii. 



Fig. 4. Trigonia Lusitanica. 



PLATE XXIII. 



Fig. 1 & 2. Gervilia Sobralensis. Fig. 7 & 8. Perna Lusitanica. 



Fig. 3 to 6. Gervilia Fittoni. 



PLATE XXIV. 

 Fig. 1 & 2. Perna polita. Fig. 5. Natica Lusitanica. 



Fig. 3. Pecten Lusitanieus. Fig. 6. Neritaturbinata. 



Fig. 4. Ostraea pustulosa. Fig. 7. Neritina bicornis. 



PLATE XXV. 



Fossil Echinidae from the Hippurite limestone and Subcretaceous beds. 



Fig. 1. Echinus Olisiponensis, from the Hippurite limestone. 

 Fig. 2. Echinopsis subuculus, from the subcretaceous beds. 



