WITH DESCRIPTIONS OF SOME OF ITS ORGANIC REMAINS. 257 



Shell ovate, inflated ; spire rather produced ; whorls five, rather flattened; aperture contracted, elongate. 



Found on the top of a mountain between Tocaima and La Messa, in New 

 Granada. Dr. Gibbon. 



My Cabinet. 

 Diam. 1-3, ' Length 1.5 inches. 



Remarks. — This is the only spiral species brought by Dr. Gibbon among 

 the fossils from Colombia. It is the more interesting, as the Oolitic formation 

 is the first in which this genus appears in Europe. Mr. Smith, in his " Strata 

 Identified," figures, on his plate of the " Coral Rag and Pisolite," an Ampulla- 

 ria, (Fig. 2,) which resembles, in form, this Naiica; and I think that De la 

 Beche means this when he quotes Natica arguta., Smith, as existing in the 

 Coral Rag, as Woodward does also. 



Spatangus Colombianus. Plate IX., Fig. 11. 



Sp. ovato-cordatus, gibhus, convexus, anticl planulato ; ambulacris quinis, lanceolatis, transversim 

 punctatis. 



Sp. ovately cordate, gibbous, convex, flattened before ; ambulacra five, lanceolate, transversely punc- 

 tured. 



Found in the mountains between Tocaima and La Messa, New Granada. 

 Dr. Gibbon. 



My Cabinet. 

 Height .9, Length 1.4, Breadth 1.3 inches. 



Remarks. — A single specimen only was received, and it seems to be differ- 

 ent from any which has been described. 



THE OOLITE OF CUBA. 



Within a few years I have received specimens of organic remains from two 

 friends in Cuba. On examination I found part of them to belong to the Ooli- 

 tic group, and, most probably, to the higher members of it. Those from near 

 VII. — 3 p 



