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



Found in tlie hippurite limestone near Lisbon. 



Although this species closely resembles Echinus granulosus, its 

 nearest ally is Echinus nodulosus (Goldfass, tab. 40. fig. 16), a species 

 found in the Calcaire a polypiers of Normandy, Luc, and Bayreuth. 

 Professor Agassiz (in the Catalogue Raisonne des Echinides) enume- 

 rates a manuscript species of M. Desor, from the white chalk of 

 Martignies near Guievrain, which, judging from the short notice here 

 given, appears to approach still more nearly that before us. 



CiDARis CLTJNiFERA, Agassiz, Echiu. Suiss. ii. 68. t. 21. f. 20, 23. 



Spines only, but exactly agreeing with the representations of those 

 of the Neocomian species (from Neuchatel in Switzerland), to which 

 we have referred it. 



Subcretaceous limestones near Torres Vedras and Alenquer. 



CiDARis GLANDiFERA, Goldfuss, Pet. Germ. p. 120. t. 40. fig. 3? ; 

 Agass. Echin. Suiss. t. 21«. fig. 9 ? 



A single spine, approaching so closely to those figured by Goldfuss 

 and Agassiz that we scarcely dare to separate it as a species. It 

 differs slightly in having the tuberculated ridges less granular cen- 

 trally and below. The Cidaris glandifera is a coral rag species. 

 Mr. Sharpe's specimen is from the subcretaceous limestone of Alen- 

 quer. 



There are fragments of a third Cidaris from this Hmestone at 

 Ourem. 



ECHINOPSIS 1 SUSUCULUS, sp. uov. Pl. XXV. fig. 2. 

 E. ? testa subconica, areis ambulacralibus aiigustis, assnlis omnibus tuberculis pri- 



mariis mediocribus ornatis, tuberculis distantibus, in areis ambulacralibus serie- 



bus duabus, in areis interambulacralibus seriebus quatuor dispositis, verrucis 



minimis sparsis. 



Breadth -^ inch ; height -^ inch. 



I have referred with doubt to the genus Echinopsis the fragment 

 of a little Urchin from the subcretaceous limestone of Figueira, in 

 which the tubercles are so worn as to render the determination of the 

 perforated or non-perforated character of their summits doubtful. 

 The pores are ranged in a single series. The general aspect of the 

 species so strikingly resembles that of Galerites subuculus, that, were 

 it not for some of the plates of the ovarian disk still remaining, we 

 should scarcely have been warranted in placing the specimen among 

 the Echinidce. The species of Echinopsis to which it approaches are 

 from the nummulitic limestone and the white chalk. It is very di- 

 stinct however from either. 



Plate XXV. fig. 2 a. Natural size. 



Fig. 2 5. Magnified. 



DiADEMA LUSITANICUM, Sp. UOV. Pl. XXV. fig. 4. 



D. testa depressa, areis ambulacralibus latis, interambulacrales subaequantibus ; 

 assulis omnibus tuberculo primario ornatis, tuberculis omnibus fere sequalibus, 

 tuberculis secundariis nullis, verrucis minimis inter tubercula sparsis, in areis 

 ambulacralibus paucis ; margine incisuris conspicuis. 



Breadth -^ inch ; height -^^ inch. 



