1892.] Recent Literature. 325 



whole seems well adapted to replace the well-known " Lehrbuch " of 

 Claus. It is possibly not so satisfactory in its treatment of the inver- 

 tebrates, but in the vertebrates, as one would expect from Dr. lions' 

 reputation, it far surpasses the latter. Its smaller size is distinctly a 

 recommendation in its favor. The illustrations, 378 in Dumber, are 

 largely diagrammatic, but are not very artistic. 



The fifth edition of Claus's Lehrbuch" has been subjected to only a 

 very cursory examination. The additions (92 pages and 77 cuts) "are 

 considerable but they seem to be mostly of mi nor importance, while 

 the many glaring faults of the previous edition are left unaltered. 

 Possibly a more thorough examination would show that the improve- 

 ments were commensurate with the increase in size. 



It is greatly to be regretted that the zoology of Hatschek 3 show but 

 slight chance of completion, for while the work is scarcely adapted for 

 the students of the grade of those in our colleges, it is certainly so far 

 as it goes, most suggestive to the more advanced morphologic. That 

 very wealth of theory, which spoils the work for the beginner, opens up 

 new vistas to his instructor. Yet, if it never be completed, it will 

 long have its value for the student, just as has the still uncompleted 

 vertebrate volume of the Handbuch der Zootomie of Stannius. An 

 analysis of the work is next to impossible in its uncompleted 

 condition. 



One familiar with Schmidt's small Comparative Anatomy would 

 never recognize it in Lang's new edition, 4 in which, to our minds all 

 reference to the previous editions should be omitted. The two parts 

 which have already appeared discuss those groups which are usually 

 included under Protozoa, Ccelenlerates, Worms, and Arthropods ; and 

 here as in Hatschek's work, the subject is allowed to logically develop 

 itself, there being no distinction between general and special portions. 

 Thus in Lang's work there are first a few words upon the cell and 

 then the account of the unicellular animals, the tissues and organs of 

 the many-celled forms being described and elucidated later as the 

 occasion demands. Between Hatschek's and Lang's works there are 



2 C. Claus. Lehrbuch der Zoologie. 5 Aufl. Marburg, 1890, pp. xii, 958, xx. 



'Lehrbuch der Zoologie, eine morphologische Ubersicht des Thierreiches zur 

 aschaft von Dr. Berthold Hatschek. Erste 

 bis dritte Lieferungen Jena, 188S-1S91, pp. iv, 432. 



'Lehrbuch der vergleichenden Anatomie zum Gebrauche bei vergleichend anato- 

 mischen and zoologischen Vorlesungen von Dr. Arnold Lang. Neunte ganzlich 

 umgearbitete Auflage von Edward Oscar Schmidt's Handbuch der vergleichenden 

 Anatomie. Erste und zweite Abtheilungen. Jena, 1888-1890, pp. iv-5(iG. 



