1902 Journal of Applied Microscopy 



with a much diluted mixture of eosin-soda-methylen blue, the blood plates are 

 clearly seen lying isolated or in very small heaps. Well-preserved plates are 

 an intense red-violet, sharply outlined with a central part and an outer pale, clear 

 blue border. The color of the central part resembles that of leucocyte nuclei. 

 Many blood-plates in well-preserved preparations and most in poor ones are with- 

 out sharply defined nuclei ; but throughout the whole area of the outermost, 

 pale, clear blue protoplasm are scattered intensely red-violet granules. These 

 closely resemble the granular chromatin in many malarial parasites. The author 

 considers all dry blood preparations, even those most carefully prepared, open 

 to objection. a. m. c. 



CURRENT ZOOLOGICAL LITERATURE. 



CHARLES A. KOFOID, University of California. 



Books and Separates of Papers on Zoological Subjects should be Sent for Review to Charles A. 

 Kofoid, University of California, Berkeley, California. 



Houssay, Prof. F. La forme et la vie. Essai The method of presentation of the 

 de la methode mecanique en zoologie, pp. , i i • ■ ■, 



924. Avec 782 figures dans le texte. Pads, ^^cts and theories concerning the 

 1900. Schleicher Freres editeurs. Prix 40 structures, relationships, and functions 

 frsncs 



of animals has become somewhat 



stereotyped in text-books and manuals in recent years. Professor Houssay 

 abandons largely the systematic basis and adopts what he is pleased to call a 

 mechanical one, though in a broader sense than that usually conveyed by the 

 term. The work is divided into three sections, " Stafi^ue," treating oi the struc- 

 ture of animals from higher to lower groups, and the elements of structure, 

 " Cmemah'gue," trea.tir\g oi developmental processes, phenomena, and theories ; 

 ^'Dynami^ue," treating of the causes of the variations in forms discussed in the 

 preceding section. The book is profusely illustrated, many new cuts from a 

 wide range of original sources appearing in the text. Many diagrammatic figures 

 of inferior quality illustrative of various theoretical phases of the subject add 

 interest and variety to the work. Several of the chapters, notably those dealing 

 with parasitism, larval forms, and polymorphism, are of more than usual interest 

 by reason of their wide range of illustrative matter. c. a. k. 



Vaullegeard, A, Etude experimentale et Cestodes in the intestine of the dog and 

 critique sur 1' action des Helminthes I. ^f fig^ do not produce in the lining of the 

 Cestodes et Nematodes Bull. Soc. Linn. '^ ° 



Normandie. 56 Ser. 7.4:84-142, 1901. intestineof the host at the point of their 

 ReviewinZool. Centbl.-8:623-624, 1901. attachment any of the usual phenom- 



ena of irritation. The cestodes produce no digestive ferment and thus depend 

 upon food elaborated by their hosts. Their tissues contain poisons which on 

 crushing are extracted by distilled water and certain other fluids. This extract 

 if injected into the body-cavity of mammals or the frog causes death. The fluid 

 is slightly opalescent and the poison is in part precipitated by alcohol and in 

 part stays in solution. The dried precipitate is largely albuminoid, but a small 



