Published online by Cambridge University Press: 01 May 2009
Recently Mr. A. Stuart (1927, PP. 545–57) has published an account of the variation in a large number of specimens of Volutospina spinosa from the Calcaire Grossier of Grignon. In his study of that group he emphasized the variation in the ontogeny of the individual, and suggested the importance of such studies in relation to the more philosophical aspects of biology and in relation to the application of ontogenetic evidence to the problem of classification. The group studied by Mr. Stuart was one in which the latitude of variation in any character was particularly small.