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 Woodward. 



