224 REVIEWS AND BOOK NOTICES. 
is that made on pp. 15 and 17, where, in the hope of closing “ the 
first century of this [the homological] controversy by proposing a 
view embracing the best elements of both the two great parties, 
syntropists and antitropists,” the author says: ‘it is probable 
therefore, that for a final solution of the problem we must combine 
the viswal method of Huxley, as based on the facts of position in 
the embryo and lower animals, with the intellectual method of 
Wyman, as based upon a great law of organization.” 
* 
The “ historical sketch of the question ” with which the article 
opens is a valuable contribution of the literature of the subject, 
meriting a more pretentious name, since it is a critical summary 
of most that has been done in this field — one than which few have 
been more harrowed with so little cultivation. The author con- 
tinues with a revised nomenclature of parts and of ideas—a bol 
attempt to furnish some new tools of thought and sharpen others, 
the success of which can only be surmised, since this depends 
more upon acceptability than adaptability. Such words as meros, 
talus and genu strike one peculiarly, while such as pseudantitropy 
and hypsesyntropy demand crystallization of the ideas they fore- 
shadow to command general recognition. Much original evidence 
of the morphical insignificance of numerical composition is ad- 
duced in another portion of the treatise ; while several general and 
special problems are presented for future research. May we not 
confidently look for their solution by an author who has proven 
himself an earnest, impartial and meritorious investigator? A 
chronological list of works bearing on the subject, invaluable for 
Seen closes an article of signal pertinence and acceptability, 
becomes at once indispensable to students pf philosophic 
oe and which may not improbably be hereafter recorded as 
one marking an important period in the progress of that study. 
—E. C. 
Revision oF tHE Ecury1.* — This superbly printed and lavishly 
illustrated work is another of the series of Illustrated Catalogues 
issued by the Museum of Comparative Zoology. It is a general 
work on the living species of Echini, and from the evident care in 
its preparation, combining the results of the study of the types 
of most of those who have written on this’order scattered through 
* Illustrated Catalogue of the Museum of Comparative Zoology at Harvard College. 
No. vii. Revision of the Echini. By Alexander Agassiz. Parts i-ii. With 49 plates. 
jal 8vo. pp. 
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