124 PROCEEDINGS OF THE ACADEMY OP Of twelve species of Salamanders which were known to inhabit Chester Co., Pa., the following had been seen but once in the course of six years' search. Spelerpes longicaudus, Plethodon glutinos us.Amblystoma punct a-tum, A. conspersum and A. Jeffersonianum. Hemidactylium scutatum had been seen only twice, in two distant localities, both upon the same day. June 4th. Mr. Lea, President, in the Chair, Thirty-four members present. The following papers were presented for publication : " Descriptions of new species of Cyrena, Corbicula and Sphserium. by Temple Prime." " Descriptions of new Palseozoic Fossils from Illinois and Iowa, by F. B. Meek and A. H. Worthen." " Descriptions of new fossil Mollusca from the Cretaceous formation at Haddonfield, N. J., by Isaac Lea." And were referred to Committees. Mr. Gabb remarked, that a few days ago he had discovered an outcrop of the " Ripley Group " at the point where the West Jersey Railroad crosses Big Timber Creek, between Gloucester and Red Bank. The deposit forms the subsoil of the meadows, and appears to hare been exposed in digging the ditches. It contains the usual characteristic fossils of this bed, and derives its principal interest from the fact that this locality is the nearest to Phila-delphia of the fossiliferous portions of the Cretaceous formation yet announced. June lltJi. Mr. Joseph Jeanes, in the Chair. Twenty-three members present. The following paper, being presented for publication, was referred to a Committee : " Descriptions of two new species of fresh-water shells from Michigan, by Manly Miles." Mr. Ennis exhibited two of the yoimg of the Kalemys Muhlmburgii, They were found in a meadoAv near Haddonfield, in Camden County, New Jersey. They are of different stages of growth, and show very remarkably the relation of this genus to two other genera. The younger is spotted with small yellow spots similar to those of the Nanemys guttata. The older of the two is sharply sculp-tured with concentric grooves on all the plates of the carapace, similar to those of the Gh/ptemys insculpta. These facts help to show that, in a systematic ar-rangement, this genus the Kalemys should stand between the Nanemys and the Glyptemys, and this is actually the place assigned to it by Agassiz for other reasons ; he, in his late elaborate treatise on the Tettudinata says he had never seen the young of the Kalemys. The spots on the head and neck of the young Kalemys are as numerous as those of the adult Nanemys. They are also of a bright lemon color, though two of the spots on the sides of the neck are larger and of the deep orange characteristic of this species. The spots on the carapace are of a dim dusky yellow. There is one on the middle of each plate except on the bordering [June,
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