438 NATURAL SCIENCE. JuNE, 1893 
while the scales on the tail of the same fish are as thin and deeply 
overlapping as in a herring. 
In a general review it does not seem appropriate to enter more 
closely into the details of Dr. Fritsch’s work; Dr. Traquair has 
already published a critical notice in the Geological Magazine (dec. iii., 
vol. x., pp. 175-178). We would, however, urge all who are 
interested in Comparative Anatomy to study the original for 
themselves. 
A. SmitH Woopwarp. 
