38 THE ZOOLOGIST. 



lation. So fully is this the case with figs. 87 and 121 that it is 

 difficult to believe them to be representations of the same thing. 

 And, by way of a small detail, there is something particularly 

 gruesome in the style in which figures such as 338 and 339 are 

 rendered. The author has availed himself of many familiar and 

 highly characteristic illustrations — notably those of Iris, so well 

 known; but certain time-honoured diagrams which are met with 

 everywhere, might with advantage be replaced — notably those of 

 Rathke, which depict the metamorphoses of the aortic arches. 

 Although the work is professedly devoted to " Man and 

 Mammals," it is in reality of a more comprehensive character, as 

 is proved by the method of treatment and the lists of literature 

 cited. All the more reason, therefore, that the said diagrams 

 should have given way to the more recent and accurate ones of 

 Boas ; and that at least direct allusion should have been made to 

 Zimmermann's alleged discovery of the fifth or pre-pulmonary 

 arch in the rabbit. 



The translation, as a piece of literary work, is well done ; 

 but we nevertheless deprecate the employment throughout of the 

 words "outer," "inner," and "middle," "germ langers," instead 

 of their conventional English equivalents. The translator 

 remarks in his preface (which we note, incidentally, does not 

 bear a date) that he has called " the reader's attention to some 

 . . . topics in which the most important advances have been 

 made during the interval of translation," but comparison with 

 the original shows him to have but feebly carried this into effect. 

 The non-incorporation of, for example, the works of Duval, 

 Hubrecht, and Stahl, on the placenta ; of Mitsukwi, on the em- 

 bryonic envelopes and germinal layers of the Chelonia; are, 

 under the circumstances, inexplicable. There is something 

 incongruous in the fact that the translator, who has failed to 

 carry this resolve into effect, should be he who has stimulated 

 his pupils and co-workers to the production of those exhaustive 

 resumes of progressive research which constitute a unique feature 

 of the ' Bulletins of the Museum of Comparative Zoology ' with 

 which his name is so honourably associated. More wonder then 

 that the cover of the book should bear the gilded names of the 

 author and translator hyphened into one, in accordance with the 

 unjust and misleading principle adopted by the publishers for the 

 series of Science Manuals to which this one belongs. 



