July 19, 1901.] 



SCIENCE. 



107 



merous zoological and medical articles pub- 

 lished in different languages and in different 

 parts of the world. 



First he gives a discussion of the general life 

 cycle of the coccidia. This is followed by a 

 classification of the coccidia. Chapter II. dis- 

 cusses the life cycle of the malaria plasmodium, 

 while Chapter III. is given up to a general dis- 

 cussion of the more recent results in the other 

 groups of Sporozoa. Taken as a whole, the 

 material is well digested, and makes an excel- 

 lent summary for any one who wishes to inform 

 himself quickly regarding the most recent re- 

 sults in investigations concerning Sporozoa. 



The work contains 35 illustrations, which 

 add to a proper understanding of the text. 

 One of the great diflSculties in following the 

 articles of the present day on the Sporozoa is 

 the fact that so many different authors have 

 considered it necessary or advisable to intro- 

 duce so many new terms designating the dif- 

 ferent stages of development. If, for instance, 

 we compare Eoss's articles of 1898 with those 

 of 1899 or 1900, we find different terms used 

 for the same stage. Eay Lankester in 1900 

 uses still other terms ; Harvey Gibson an en- 

 tirely different terminology ; while Grassi has 

 repeatedly changed his technical terms. One 

 almost needs a separate dictionary to-day to 

 understand the literature on the Sporozoa. 

 Liihe has in the main followed the terminology 

 adopted by Schaudinn, 1899, and he gives a 

 table by which it is possible to follow the ter- 

 minology adopted by most of the other, 

 authors. 



So far as the coccidia are concerned, Liihe' s 

 discussion compares quite favorably with the 

 recent summary given by Kafael Blanchard in 

 the Societe zoologique de France, but it cer- 

 tainly is not superior to Blanchard's work 

 in either style or presentation ; in fact, it 

 would be very diflQcult to improve on Blanch- 

 ard's article. Liihe's discussion of the malaria 

 parasite compares very favorably with the dis- 

 cussion recently published by Blanchard, Lave- 

 ran and others in the French Academy of 

 Medicine, but in addition to the abstract dis- 

 cussion of the life cycle of the parasite, he 

 gives a general historical introduction to the 

 subject, with a review of recent literature, and 



makes an effort to establish the priority of cer- 

 tain discoveries. We are somewhat surprised 

 to miss in this introduction all reference to the 

 valuable contribution by Dr. King, of Wash- 

 ington, who was apparently the first author to 

 give a scientific summary of the reasons in 

 favor of the view of the transmission of ma- 

 laria by mosquitoes. 



Chapter III. assumes on the part of the 

 reader a certain amount of knowledge of the 

 groups discussed. 



One point in connection with the work we 

 can hardly leave uumentioned, and that is the 

 antiquated method of citing literature. Each 

 group has its own bibliography arranged alpha- 

 betically by authors. This results not only in 

 unnecessary repetition, but also in confusion; for 

 instance. Max Braun's treatise on animal para- 

 sites of man is No. 2 in the first bibliography, 

 No. 12 in the second bibliography, and No. 2 

 in the third. The work would be greatly im- 

 proved if the Harvard system of bibliography 

 had been adopted. 



C. W. Stiles. 



SCIENTIFIC JOURNALS AND ARTICLES. 

 The May number of the Bulletin of the Ameri- 

 can Mathematical Society contains the following 

 articles : ' Non-Oscillatory Linear Differential 

 Equations of the Second Order,' by M. Bocher ; 

 ' Concerning Real and Complex Continuous 

 Groups,' by L. E. Dickson; 'On Holomor- 

 phisms and Primitive Roots, ' by G. A. Miller ; 

 Reviews of Graf and Gubler's Bessel Functions 

 II., by V. Snyder, and of Ricci's Theory of 

 Surfaces, by H. S. White ; ' Notes ' ; ' New 

 Publications.' The June number contains re- 

 ports of the April meeting of the Society, by 

 E. Kasner, and of the April meeting of the 

 Chicago Section, by T. F. Holgate ; ' The Value 

 of a Certain Integral,' by F. Morley ; ' On the 

 Algebraic Potential Curves,' by E. Kasner ; 

 Review of Steinmetz's Alternating Current 

 Phenomena,' by J. B. Whitehead, Jr. ; and of 

 de Tannenberg's Applications of the Calculus to 

 Geometry, by L. P. Eisenhart ; ' Notes ' ; 

 'New Publications.' The July number, con- 

 cluding Volume 7 of the Bulletin, contains : 

 ' Surfaces whose First and Second Fundamental 

 Forms are the Second and First Respectively 



