. Bulletins of American paleontology. Wisconsin Mollusks: Browne and Bruder 203 Soil 2'6" IPJJSlTTiln' Clayey loeu 2'6". S\V basement excavation base of hill Locality 2 top of hill NE LOCALITY 3 The gully section or basal part (intervals one to five feet) at this locality differs from the upper part (13 to 22 feet) of the section. In the basal part of the section the dominance of the listed woodland species and the presence of Anguispira alternata and Discus cronkhitei implies a humid, forested or forest-bordered situa- tion. The decrease of Succinea upward and the presence of Dero-
. Bulletins of American paleontology. Wisconsin Mollusks: Browne and Bruder 203 Soil 2'6" IPJJSlTTiln' Clayey loeu 2'6". S\V basement excavation base of hill Locality 2 top of hill NE LOCALITY 3 The gully section or basal part (intervals one to five feet) at this locality differs from the upper part (13 to 22 feet) of the section. In the basal part of the section the dominance of the listed woodland species and the presence of Anguispira alternata and Discus cronkhitei implies a humid, forested or forest-bordered situa- tion. The decrease of Succinea upward and the presence of Dero- ceras laeve only in the first foot interval suggests a decrease in moisture. The presence of Euconulus fulvus and Vertigo modesta indicates a cooler climate than exists in the area today. In the upper part of the section, the small percentage of wood- land species and the absence of Anguispira alternata implies more open country than existed in the basal part of the section. The area was still cool since Vertigo modesta still persisted. It was, however, drier than the gully section. Succinea grosvenori and Deroceras laeve had disappeared. LOCAL] I Y I Sampling before Locality 4 (Henderson Bypass) was destroyed by construction of the bypass showed the following species to be present in the powdery calcareous loess overlying the basal clay at the base of the section — Hendersonia occulta, Vertigo gouldi, Fos- saria dalli, Carychium exile canadense, and Deroceras laeve. These species are all indicative of a moist habitat. The basal clay con- tained no molluscs but an abundance of fossil wood was Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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