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BULLETIN OF THE UNITED STATES FISH COMMISSION. 
EXPLANATION OF PLATE XLIV. 
Fig. 21. Side view of yotmg sterlet of two montlis. The nasal bridge is developed. The dorsal scutes 
are seen to now overlap, as do the fulcra of the upper margin of the tail at the later stage. 
The fin-folds and actiuotrichia seem to have a share in the development of the dorsal scutes 
and fulcra. Lateral series of scutes still rudimentary, and abdominal wanting. After 
Zogralf. 
Fig. 22. The quite young of the great Huso of eastern Europe, Acipenser huso. Natural size. From a 
specimen brought from Russia by Ehreuberg. This specimen serves to illustrate the next 
advances beyond the preceding, since the lateral anil ventral rows of scutes are well devel- 
oped, while the operculum quite covers in the branchial processes. After Brandt and Eatze- 
burg. 
