I place Eleotris prismatlca Bleeker with the present species as 
I am unable to find sufficient characters for distinction. One of the 
specimens reported as Butis prismaticus by Jordan and Richardson, with the 
body depth given as 4 to 4j is not distinct. The statement "They are 
plainly distinguished from Butis butis by their shorter, more robust body, 
shorter maxillary, smaller eye, and finer teeth" does not appear to me 
to be valid differences. 
I find no distinctions for Butis leucurus Jordan and Seale, and 
their statement "This species, having no serrated crests on the head, 
may not be congeneric with Butis butis ", is of no moment. 
In naming Butis dayi Bleeker had no materials, but simply applied 
the name to Day's short account of his Oris% material. He mentions Day's 
transverse scale count as 15 , body depth 5, head 3, pectoral rays 17 and 
maxillary reaching eye center. 
