yield three new genera, each represented bj'^one new species, and a new species of Pomacea. They were collected by Doctor Sheppard in the vicinity of the towns of Biblian and Paccha, Ecuador. Until recently both these towns were in the Province of Canar, in southern Ecuador. A recent change in provincial boundaries leaves Biblian in Canar but places Paccha in the adjoining province, Azuay. The junior author has supplied the following data referring to the two localities, which lie on the watershed between the Atlantic and the Pacific : Biblian lies a few miles northeast of the provincial capital, Azogues, and a little southeast of the city of Canar. It is located on the northwest bank of a small river, tributary of the Rio Paute, the waters of which, by way of the Rio Santiago and the Rio Maranon, reach the Amazon in western Brazil. About 7 or 8 miles north, and coming from some distance east, is a tributary of the Rio Canar, which flows into the Rio Naranjal of the Pacific drainage. Between the Naranjal and the Paute is a range of mountains, approximatel}1 2,140 feet in altitude. Azogues, but a mile or two downstream from Biblian, has an altitude of about 8,200 feet, indicating a rapidly descending river, probably with high banks. Paccha, now in the Province of Azuay, is a much smaller town, considerably south of Biblian and lying between the Rio Paute and a tributarj^, the Rio Quingeo. It is situated in a high valley, surrounded by hills, except on the side toward the Rio Paute, which here flows in an east-northeast direction. Southwest, toward the Rio Quingeo, is a high pass, but most of the surrounding country is less than 10,830 feet in altitude. Cuenca, on the Rio Matadero, a western
