SHORT BIGEYE IN WESTERN NORTH ATLANTIC 



133 



Figure 22. — Juvenile or adult Pseiidopriacanthus alius, 236.6 mm, standard length (BLBG, Silver Bay 1393). 



Figure 23. — Juvenile or adult Pseudopriacanthus alius, 261.8 mm. standard length (BLBG, Silver Bay 1393). 



In a 16.8-mm. individual (fig. 13), a third row of 

 light spots had begun to form at the base of the 

 spinous dorsal, and pigment had just begun to 

 form on the anteriormost inter-soft-ray membranes. 

 This same dorsal-fin pigmentation was present in 

 a 19.9-mm. individual (fig. 14). 



By34.0min. (fig. 15), three rows of tni[)igment(>(l 

 spots were prominent, and some of tlie sjjots ex- 

 tended anteriorly across the spine to the lU'.xt 

 interspinous membrane. A fourth row of spots 

 had begun to form at the base of some spines. 



The pigment mass at the base of the raj's and 

 membranes of the soft dorsal fin had separated 

 slightly from the base of the fin — a few isolated 

 chromatophores remained on both the raj's and 

 their interiuembranes. Scattered chromatophores 

 were present on the soft-dorsal rays, between the 

 |)igment mass and the edge, forming several irregu- 

 lar rows parallel to the base of the fin. It seemed 

 that a migi-ating chromatophore split upon reach- 

 ing a brancli in a soft-ray. In specimens of this 

 size, about 34 mm., several light spots, similar to 



