Excerpt from Neogene Paleontology in the Northern Dominican Republic 15: The Genera Columbella, Eurypyrene, Parametaria, Conella, Nitidella, and Metulella (Gastropoda: Columbellidae)The Stratigraphic ranges of these species - or rath er their stratigraphic occurrences - are plotted in Text figures 2 to 9. As pointed out by Jung and Petit (1990, p. 88) the species are not continuously present through a given sequence of sediments, rather their occurrences are spotty. Several species occur only in one of the sections considered herein, others have been found in more than one section. The distribution of species in the various sections is as follows.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.