1 8 Bulletin 30 434 



Section at Los Quemados 



Feet 



Concealed with vegetation and unexplored. 



Limestone with poorly preserved corals. Approximate thick- 

 ness 50 



Zone A. Hard, light blue clays forming vertical cliffs slightly con- 

 cave near the base. The clays weather yellowish-white. 

 Fossils rare or absent in the upper parts of the bluffs, abun- 

 dant below. Fauna chiefly Gastropods. A few Pelecypods 

 as Venericardia and Echinochama. Approximately 300 



Zone B. Hard blue clays, blocky, not well stratified, weathering 



grayish. Fossils abundant. Thickness about 50 



Zone C. Alternating clays and limestones, with a rather heavy 

 bed of the latter above. Fossils very scarce, Cassis sulcifera. 

 Thickness approximately 10 



Zone D. Hard, blue calcareous clays. Corals. Cerithium abun- 

 dant. About : 15 



Zone B. Blue, uniform clays with Cerithium, Phos, Cyprcea. 



Approximately 20 



Zone F. Hard, greenish clays with concretions. Corals, Cassis, 



Xenophora . Approximately 20 



Zone G. Two miles above Los Ouemados. Hard, grayish-green 

 clays with sandy layers and limonitic nodules. Strata in 

 general unfossiliferous but lenses very rich in fossils occur. 

 Amauropsis. Few species in common with the preceding 

 zones. Exposed thickness 10 feet, estimated total thickness 

 at least 50 



Unexplored. 



Fauna of Zone A. — Zones A and B were examined success- 

 ively and their faunas kept distinct, but they apparently form a 

 stratigraphic unit and might better be grouped as A and B. 

 We obtained the following species from Zone A : 

 List of Species 

 Terebra Petiti, n. sp. Latirus infundibulum Gm. 



Conus catenatus Sby. Vasum haitense Sby. 



Conus granozonatoides, n. sp.' Distortrix simillima Sby. 



Turris albida Perry. Sconsia laevigata Sby. 



Turris albida tellea Dall. Strombus haitensis Sby. 



Turris albida antillarum C. Strombus bifrons Sby. 



Drillia consors Sby. Solarium quadriseriatum Sby. 



Cancellaria epistomifera Gpy. Natica Youngi, n.. sp. 



Lyria pulchella Sby. Scapharca riogurabonica, n. sp. 



