1849.] SHARPE ON THE SECONDARY ROCKS OF PORTUGAL. 141 



Seville, as the church of the Hospital de Sangre in that city is built 

 of a rose-coloured marble closely resembling that of Pero Pinheiro, 

 and full of the same species of Capinnula and Sphcerulites as are 

 found in the hippurite limestone near Lisbon. 



I have only to add a list of the organic remains found in this for- 

 mation, by which it will be seen that all the species known elsewhere 

 belong to the chalk or greensand. Coupling with this the fact that 

 the hippurite limestone is the uppermost bed of the secondary series 

 in Portugal, we cannot hesitate to class it as the equivalent of the 

 chalk of northern Europe. 



It is remarkable that fifty-five per cent, of the species found in this 

 formation are new, only forty-five per cent, being known to the north 

 of the Pyrenees. It is also worthy of notice that no cephalopods nor 

 brachiopods have been found in the hippurite limestone. I shall 

 return to this subject before concluding. From the close proximity 

 to Lisbon of the quarries in the valley of Alcantara, I had far more 

 opportunities of collecting fossils from this than from any of the 

 lower formations : the following table is therefore more nearly com- 

 plete than any of the succeeding lists. 



Organic Remains of the Hippurite Lifnestone near Lisbon. 



Astraea? (one species). Exogyra plicata, Lam. 



Echinus Olisiponensis, n, s. Isocardia cretacea ?, Goldf. 



Brissus scutiger, n. s. Ostraea globosa, Sow. 



Area Moutoniana, jyOrh. Pecten inconstans, n. s. 



Olisiponensis, n. s. striatocostatus, Goldf. 



Passyana, D^Orb. Perna? fragilis, n. s. 



Avicula Olisiponensis, n. s. Pholadomya Ligeriensis, D'Orb. 



Caprinula brevis, n. s. Nerinsea Eschwegii, n. s. 



Boissyi, D'Orb. nobilis, Goldf. 



d'Orbignii, n. s. Olisiponensis, n. s. 



Doublieri, B' Orb. sp. Tylostoma globosum, n. s. 



Cardium corrugatum, n. s. ovatum, n. s. 



Olisiponense, n. s, Sphaerulites angeiodes, Lam. 



Cyprina cordata, n. s. cylindracea, Des Moulins. 



globosa, n. s. Ponsiana, D'Archiac. 



Diceras Favri, n. s. Sauvagesii, D'Orb. 



Exogyra Olisiponensis, n. s. ventricosa, Lam. 



Lowest beds of the formation at Papel on the road from Lisbon to 



Cintra. 



Anomia convexa, Sow. Artemis elegantula. n. s. 



Area Moutoniana, D^Orb. 



Lowest beds of the formation near Bucellas. 



Cardium corrugatum, n. s. 



Subcretaceous series, including the Red Sandstone Formation and 

 the Espichel Limestone of my paper of 1839. 



The hippurite limestone rests, with a deceptive appearance of con- 

 formity, upon ferruginous sands belonging to different portions of a 

 very extensive series of beds, which are here considered together, 



