Notwithstanding that only ten or so chapters are selected in an undergraduate course, and, therefore, it cannot be assumed that the student has read a certain passage of capital importance, in preceding chapters, the style here is even more repetitive than this. For the same fact is often enumerated in the same chapter at least twice. For instance, in treating of the Echinoids under the class of Echinodermata, the author states, “But their tests bear a typical pentamerous plan of echinoderms in their five ambulacral areas ;" which is repeated at p. 494, “The five ambulacral areas are homologous to the five arms of sea stars. …” Like examples could be multiplied.
Finally, the author deals, I think, with too many subjects in this work ; which has the effect that the book is extremely cumbersome in bulk and in reading.