Science is much indebted to Mr. Scudder for a great deal of very dry and tiresome work in the preparation of Catalogues. We have already from his pen a list of the generic names used for Butterflies, and now in a thick octavo volume of 376 pages we have a “list of generic names employed in Zoology and Palaeontology to the close of the year 1879, chiefly supplemental to those catalogued by Agassiz and Marschall, or indexed in the Zoological Record.”

The list is beautifully and clearly printed and the proof reading has been exceedingly careful. After having gone over a number of names and after spending some hours with the book, I have found but one error of spelling. The labor of compiling the list has been evidently great, and Mr. Scudder speaks of it in terms which shows how arduous it really was. The author was helped by those to whom he applied for lists of the generic names proposed by them, however, and Prof. Marsh went to the trouble of printing the references to his own numerous genera.