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BULLETIN OF THE UNITED STATES FISH COMMISSION. 
EXPLANATION OF PLATE LVIII. 
Fig. 51. Young individual of the common species of the sturgeon, 9 inches loug, opened from below 
with the viscera removed to show the relations of the Woltliau bodies N, genital ridges Gli, 
to the outgoing ducts IfD, C7G, iu the sexually immature auimal. Also the nerve supply 
to the barbels and the sensory areohe of the under side of the snout iu front of the mouth. 
Natural size. 
Fig. 52. The same from below, to show the relations of the viscera to the abdominal walls and outlets, 
the internal opening.s of the genital canals are indicated by the arrows. Arrows within the 
dotted outlines of the portions of the alimentary canal, not visible from below iu this figure, 
indicate the course of the food through the intestine. Natural size. 
