584 



PROCEEDINGS OF THE NATIONAL MUSEUM 





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Figure 14. — Acanthozoon albopapillosus: a, entire worm; h, section through one of the 

 papillae. (Explanation on page 597.) 



containing eosinophilous granules. In the present species the papilla 

 is covered with an epithelium much taller than that of the adjacent 

 body wall (fig. 146). Rhabdites are present only basally and the 

 muscle layer is much reduced in the papilla. Distally the epithelium 

 contains large eosinophilous droplets. Hence it appears that the 

 papillae are secretory, probably productive of adhesive material. 



DiFFEREjsriTAL DIAGNOSIS: A. albopapUlosus differs from other 

 species of Acanthozoon in the distinctive color pattern of pinkish buff 

 areas on a black ground, pale marginal band subtended ventrally by a 

 black band, and numerous white papillae over the dorsal surface. 



Holotype: The specimen, in alcohol, is deposited in the American 

 Museum of Natural History. 



