404 THE AMERICAN NATURALIST.  [Vot. XXXV. 
wicklungsgeschichte der wirbellosen Thiere completes the translation 
of this monumental work.! As in the second and third parts, the 
translation has been done by Matilda Bernard, and the revision and 
editing by Martin F. Woodward. The present part gives an account 
of the embryology of the mollusks, the tunicates, and Amphioxus, 
and in the groups covered agrees with the third part of the German 
edition except in the omission of the chapters on the brachiopods 
and the Bryozoa, which the translators had previously placed in their 
second part. The third part of the German edition appeared in 
1893 ; the translation, therefore, is unfortunately some seven years 
late. This has put on the editor the heavy task of supplying the 
more recently acquired information on the groups under considera- 
tion. Mr. Woodward has wisely refrained from rewriting the third 
portion of the work, and has attempted to bring it up to date by 
employing footnotes and adding to the literature lists, as in the 
former part. While this is perhaps the best way out of the dif 
ficulty, it does not seem to have been employed very successfully in 
this last part. As an example, the chapter on Amphioxus may be 
cited. Our advance in the knowledge of the embryology of this 
form is indicated in some seven notes, none of which give very 
extensive information. The appendix to literature for this chapter 
contains some fifteen new titles. As these presumably cover the 
period from 1893 to 1900, the list is obviously incomplete. One 
misses any reference to Lwoff’s completed paper on the germ layers 
(1894), Legros’s note on the morphology of the sexual glands (1895); 
MacBride's note on germ layers (1896), Garbowski's discussion of 
the mesoderm (1898), Klaatsch's account of the structure and devel- 
opment of the tentacles (1898), Lankester's note on the development 
of the atrial chamber (1898), and Legros's description of the develop- 
ment of the buccal cavity (1898), contributions which, judging from 
the composition of the literature lists in the German edition, should 
have been recorded. Incidentally it may be mentioned that of the 
names given in this appendix Hamman is substituted for Hammar 
and the capitalization of MacBride is unsteady. On the whole, the 
additions made by the editor do not show the high standard of work 
characteristic of the German original. The presswork, particularly 
in connection with the illustrations, retains more or less of the mud- 
diness of the earlier parts. Notwithstanding these shortcomings, 
1 Korschelt, E., and Heider, K. Zext-Book of the Embryology of papi 
n 
vol iv. Translated by Matilda Bernard, revised and edited by Marti F.W 
ward. New York, The Macmillan Company, 1900. xii + 594 PP» 3!? figs- 
