27 Quadrille Ruled Form. John C. Moore Corporation, Rochester, N. Y. Binder and holes in leaves, each Patented 1906 3.43.6 B. Carlow Isld (RR cut) L.D. Breger, Collector. Notebook 1, page 45. June 15, 1907. Lingula cornea Sow. Common Anodontopsis angustifrons McCay Very Abundant. note 1. Tetradella (fig over) occasional Manlius Cytherellina(?) sp. Bythocypris sp. " note 2. Leperditia (figs over.) Abundant. L. hisingeri Selms., var. " L. " of angustifera Whitf. Occas. L. of hudsonica Hall. " note 1. The anterior & posterior lobes are isolated; they do not meet below, the 2 middle lobes are equal and their lower ends curve and meet below forming a horseshoe the base of which appears to be swollen into a tubercle. The loose slice is quite distinct from the anterior & posterior lobes. Also same form also occurs at 3.44.4 A. note 2. The commonest species (see figs 1,4) a low form like L. alta with fuller front than L. hisingeri. It is not so tall as L. alta. It is probably L. hisingeri Selms., var. A second form represented by figures 5&6 is a very tall species nearest to L. hudsonica Hall also not quite identical also similar to L. cæca Jones, but not so flat in front. fig 3 represents the L. angustifera Whitfield type, which is swollen ventro-posteriorly. This is probably merely the mature female.