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SCIENCE 



767 



erly set forth in the text by him under the 

 different groups, by frequent comparison of 

 their structures with those of the other groups. 



In the first chapter, a general account of 

 the whole class is given, including a historical 

 sketch, the general morphology, the ernhry- 

 ology, phytogeny (chiefly with regard to the 

 fossil forms). The morphology treats of the 

 morphological and anatomical details in the 

 following sequence: exoskeleton (body, limbs, 

 branchiffi), alimentary system, circulatory sys- 

 tem, excretory system, nervous system and 

 sense organs, glands, phosphorescent organs, 

 reproductive system. 



Of the following chapters, II. to V. treat of 

 the Branchiopoda, Ostracoda, Copepoda and 

 Cirripedia, and the same general arrangement 

 of the subject matter as above is followed 

 under each group. Chapter VI. gives a gen- 

 eral morphological introduction to the subclass 

 Malacostraca, defining their systematical divi- 

 sions, and of the following chapters, VII. to 

 XVI., each gives an account of one of the 

 orders of the Malacostraca : Nebaliacea, Anas- 

 pidacea, Mysidacea, Cumacea, Tanaidacea, 

 Isopoda, Amphipoda, Euphausiacea, Decapoda 

 and Stomatopoda. 



In the treatment of the various groups, the 

 general arrangement is similar to that used 

 in the introductions to the larger groups, but 

 " remarks on habits," a more detailed discus- 

 sion of " paleontology," and remarks on " affini- 

 ties and classification " are added, and this is 

 followed by a sketch of the system, which gives 

 diagnoses of the main systematical divisions 

 of each order, bringing it down to the families 

 and genera, the former of which are quoted 

 rather completely by name, while of the latter 

 the most important ones are named. 



The different orders have received a rather 

 uniform treatment, which is a feature of the 

 book which should be especially mentioned, for 

 we may sometimes observe, in similar treatises, 

 that the author is not quite impartial, de- 

 voting, for obvious reasons, more time and 

 space to those groups to the study of which 

 he has applied himself more energetically. 

 Caiman has avoided this, and thus the whole 

 book makes the impression of a carefully 



plaiuied and well-executed attempt to give an 

 account of the morphology, anatomy and em- 

 bryology of the whole class. At the same time, 

 nothing of importance has been omitted. Of 

 course the remarks on habits and on paleon- 

 tology are rather short, and might be regarded 

 as unsatisfactory, but we are to consider that 

 the book forms a part of a series entitled, 

 " A Treatise on Zoology," and not of ecology 

 or paleontology, and thus these sides could not 

 have been considered to any extent in a book 

 of this character. For the same reason also 

 remarks on geographical distribution are 

 omitted. 



The book preeminently is a zoological trea- 

 tise, dealing with the purely zoological side of 

 the matter: morphology, anatomy, embryology 

 and the systematics. With regard to this, it 

 is a complete success, and should be used, by 

 zoologists, not only by the side of other text- 

 books, but is apt to supersede the latter, thus 

 becoming, for the present time, the standard 

 text-book on crustaceans. Anybody desiring 

 to get any information within the range as 

 defined above will surely find it here, and not 

 only this, but he wiU find the account given 

 up to date. A rather complete index wiU serve 

 to facilitate the search for the desired infor- 

 mation, and references to literature at the 

 end of the various chapters will give a direc- 

 tion for the study of further particulars. 



A. E. Ortmann 



Lehrhuch der Paleozoologie. Von E. Stromer 

 VON Eeichenbach. I. Theil: Wirbellose 

 Tiere. Pp. 342; 398 text figures. Leipzig, 

 Teubner. 1909. Price 10 Marks in cloth. 

 Von Stromer presents here an excellent ele- 

 mentary text-book of paleontology, written in 

 good style and not too technical in language. 

 It deals with the fossil invertebrates viewed 

 almost entirely from the biologic standpoint, 

 and while the geologic development is also 

 presented, it is too much abbreviated to be of 

 much value from the side of evolution or 

 stratigraphy. The illustrations are excellent 

 half-tones of wash-drawings made especially 

 for the work. The printing, of course, is the 

 best and the weight of the book not heavy. 



