Bulletin No. 20. 47 



The four photo-engravings, illustrating these abnormalities are of great 

 value in showing the variations in size and shape, but of necessity are 

 less useful with coloration. 



The subject of Abnormalities is one which may well arrest our atten- 

 tion, and the difficulties which it presents serve only to spur us onward 

 in the research. The task which Mr. Jacobs set himself was no easy 

 one, and he has our thanks for this presentation of the facts gathered 

 after much time and labor. 



Manipulation of Ihe Miooscofi'. By Edward Bausch. Third Edition. 

 This little volume of 200 pages and 47 figures in the text fills a gap in 

 microscopical literature. Its purpose is to acquaint the possessor of a 

 microscope, whether simple or compound, with that m.anipulation of his 

 instrument which will produce the best results. The language is simple 

 and the style clear, enabling anyone who is willing to give attention to 

 the subject to understand fully the tecnique of microcopical work. The 

 author, Mr. Edward Bausch, being a member of one of the largest 

 manufacturing firms of microscopes and their accessories in ihe country, 

 is especially fitted to undertake the preparation of a work of this nature. 

 This little book will be found invaluable to the beginner in the use of 

 the compound microscope. 



I'he To)j_rrues of Birds. By Frederic A. Lucas, Curator of Compara- 

 tive Anatomy, U. S. National Museum. From the Report of the U. S. 

 National Museum for 1895, pages 1001-1019, with two plates, and thir- 

 teen figures in the text. An interesting and valuable treatise, discussing 

 the differences in tongues, the reasons for the differences and the value 

 of the tongue in determining relationships. 



Taxidermal Methods; in the Leyden Museum, Holland. By R. W. 

 Shufeldt, Associate in Zoology, U. S. National Museum. From the Re- 

 port of the U. S. National Museum for 1895, pages 1031-1037. 



Ohio Butter/lies. By James S. Hine. A list of 93 diurnil Lepidop- 

 tera or butterflies known to occur within the state of Ohio, with notes 

 upon many species, and many references to literature. 



America)/ Monthly Mic)-oscopieal Journal, Vol. XIX. No. 4, April, 

 1898. 



Ajinual Report of the State Botanist (f the State of Neic ]'orh, 1897. 



Birds. Vol. Ill, Nos. 4 and 5, April and May, 1898. 



