. Cincinnati quarterly journal of science. Science; Science -- Ohio. Fig. 18—Modiolopsis Fig. 19—Modiolopsis Versaillesensis. Hinge line and muscular impression. Equivalve, inequilateral, oblong, expanded and compressed poster- iorly ; basal margin contracted or arched upward, below the beaks; cardinal line straight; beaks near the anterior extremity, and slightly more prominent than those of the Modiolopsis modiolaris; umbones sub- angular and extending obliquely, posteriorly ; surface marked by con- centric lines; muscular imi^ression circular and deep, below and anter- ior
. Cincinnati quarterly journal of science. Science; Science -- Ohio. Fig. 18—Modiolopsis Fig. 19—Modiolopsis Versaillesensis. Hinge line and muscular impression. Equivalve, inequilateral, oblong, expanded and compressed poster- iorly ; basal margin contracted or arched upward, below the beaks; cardinal line straight; beaks near the anterior extremity, and slightly more prominent than those of the Modiolopsis modiolaris; umbones sub- angular and extending obliquely, posteriorly ; surface marked by con- centric lines; muscular imi^ression circular and deep, below and anter- ior to the beak ; mesial ridge between it and the umbonal cavity; hinge line plain and smooth, except a slight ligamental depression below the beak. Length of specimens examined varying from f inch to 2i inches ; breadth and thickness in proportion to length. This species differs from the Modiolopsis modiolaris, in having a more prominent beak, more angular umbones, different hinge line, and lig- amentary attachments, and in having the muscular impression farther anterior to the beak. Casts of the two species might not be distin- guishable from each other. This species was found Iw me at Versailles, Indiana, about 300 feet below the rocks of the Upper Silurian, and associated with Anomalo- donta gigantea, Anodoiitopsis (?) Milleri, Pleurotomaria troindoplxeva, Tel- linomya occidentalis, 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 Cincinnati, S. A. Miller
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Keywords: ., bookcentury1800, bookcollecti, bookdecade1870, booksubjectscience
