648 



PROCEEDINGS OF THE NATIONAL MUSEUM 



xanthocyaneum, Homoschema, 15 (fig.)) 



22 

 xanthopterus, Acanthurus, 211 

 Xenocoelidia, 261, 265, 266 (key) 



colombiana, 266 



inflata, 266, 281 (fig.) 



youngi, 266, 281 (fig.) 

 Xesurus scalprum, 188 

 Xiphocentron, 469 



mexico, 467 



Xiqilliba, 261, 268 



bellator, 268, 283 (fig.) 



youngi, Xenocoelidia, 265, 281 (fig.) 



zaba, Rhabdatomis, 47, 48, 49, 50 

 Zanclidae, 212 



Zebrasoma flavescens, 178, 179 

 Ziziphinus actutus, 37 



