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PROCEEDINGS OF THE NATIONAL MUSEUM 

 42 



Figure 10. — a, b, Pseudoceros fulvogriseus: a, entire animal; h, tentacles enlarged, c, d, P. 

 fuscogriitus: c, entire animal; d, tentacles enlarged. (Explanation on page 597.) 



The preserved worm is of a uniform medium gray color, marked with 

 dark reticulations, which probably actually are the uterine anasto- 

 moses. A color photograph taken by F. M. Bayer shows that in life 



