Vogt, Virchow, Moleschott, Müller, Rolle, Schleicher, Bleek, Meigs, Gliddon, Leidy, Cope, Gray, etc., to the medical and literary world generally, however, whose acquaintance with the writings of the distinguished savans just mentioned is necessarily superficial from the nature of their pursuits, we offer a brief but, we hope, a sufficiently detailed account of a subject which is not surpassed in interest by any other. We take this opportunity of thanking Prof. Hyrtl, Dr. Friedlowsky, Dr. Klein, of Vienna, Prof. Owen, Mr. Flower, of London, and Prof. Gervais, of Paris, for their kindness in furnishing many facilities for study, as also of acknowledging our indebtedness to Profs. Leidy and Aitken Meigs for their many favors and suggestions, and to Dr. Nolan for materially assisting us in seeing this essay through the press.
Paris, June 21, 1872.
