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THE AMERICAN NATURALIST [Vol. XLI 



of the mammals, sets in. The histogenesis and the development of 

 the lymphatic system are also traced. The early stages were studied 

 by Born reconstruction methods, the later by dissection and by corro- 

 sive preparations. 



Half Hours with Fishes, Reptiles and Birds ^ is the second in the 

 series of books by C. F. Holder, designed as supplementary readers 

 for children in the grammar grades. The section devoted to birds 

 suffers from the same defects in the arrangement of material that were 

 pointed out in the review of the earlier volume (American Naturalist, 

 40, p. 140, 1906). The part dealing with fishes is full of interesting 

 information vividly presented. 



R. H. 



Notes. — In the Proceedings of the Indiana Academy of Science for 

 1905 (1906) Dennis and Petry give an interesting series of photographs 

 of the young of the turkey buzzard showing the changes in the plumage 

 from the tenth to the seventy-fourth day after hatching. 



Zeleny (Proc. Acad. Sciences Indiana [for 1905] 1906) describes 

 the regeneration of an antenna-like appendage in the place of an 

 excised eye in the blind crayfish. The new organ has tlie ai)|)canince of 

 a functional tactile organ and the experiment has csiHcial interest in 

 that a functional organ has developed in place of the fnnctionhvss eye. 



Martin describes (Proc. Indiana Acad. Sci. [for lOO.')] IDOii) a liandy 

 clamp by which the blades of 'safety razors' may lie used for xciion 

 cutting, thus materially reducing the cost, confusion, etc, of supplying- 

 section knives to large classes. 



Madison Grant publishes some "Notes on Adirondack ?tlainmals" 

 in the Eighth and Ninth Report of the Forest Fisli and ( Janic ( oinmis- 

 sion of New York. The paper, which supplements Dr. Merriam's 

 well known work on the same region, is illustrated w ith some line half 

 tones, some taken in the forest, others in the New ^'ork Zoological 



(\ W. .Johnson has eolleeted all the refereneo to the app.'arane.- an<l 

 <listril.ution of the Kn^rUsh ^Mrden snail, Ihlix hnrlrn.sls, in .\meriea 

 and is inclined t.> think (Nautilus, 20, p. 7:^,, m)i\) that it has not been 



' Half Hours wit h I'ishes. Reptiles and Birds. By Charle.s Frederick Holder. 

 N. Y. American Book Company, pp. 255. Illustrated. 



