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PROCEEDINGS OF THE ACADEMY OF 



[Feb., 



oblique, reaching near middle of pupil. Preorbital rim narrow, with 

 coarse serrations. Margin of preopercle coarsely serrated. Opercle 

 with a strong spine above, the one just below but little shorter. 

 Preopercle with a strong spine reaching beyond gill-opening, but not 

 quite opposite base of pectoral. Nostrils small, without spines. 

 Interorbital space broad, flattened, the supraocular ridge formed on 

 each side sharp. 



Gill-opening large, extending forward about opposite front margin 

 of pupil. 



Scales large, spinescent, those on middle of side rather narrowly im- 



Fiff. 4. Holocenthrus thorntonensis Fowler. 



bricated. Four or five rows of scales on cheek extending up on post- 

 ocular region, head otherwise naked. Bases of soft dorsal and anal 

 scaly, line of demarcation distinct on fins. Base of caudal scaly, scales 

 extending well out and becoming smaller. Lateral line forming an 

 even convex curve, more or less parallel with dorsal profile. Tubes 

 simple. Base of ventral with small scaly flap. 



Spinous dorsal inserted about opposite origin of ventral, third spine 

 longest, first and fifth of about equal length, and others all graduated 

 down, last very small. Soft dorsal inserted behind origin of spinous 

 anal, small. Third anal spine longest, rayed fin small. Caudal forked. 

 Pectoral small, low, inserted a little before spinous dorsal. Ventral 



