1904.] 



NATURAL SCIENCES OF PHILADELPHIA. 



229 



little large. Interorbital space a trifle narrow. Posterior nostril rather 

 large. Obsolete lateral ridge along each side of interorbital space. 

 A rather narrow dagger-like preopercular spine equal to about | of 

 orbit, along its upper margin. Rakers iii 2 + 8 iii, longest nearly 

 equal to diameter of pupil. Scales small. Third and fourth dorsal 

 spines longest, subequal, fifth a little shorter. Caudal lobes damaged, 

 their length about equal. ' 



Length 5^ inches. 



Type No. 27,271, A. N. S. P. Honolulu, Hawaiian Islands. U. S. 

 Fish Commission (No. 14,233). 



Three examples. This is the northern representative of Holocen- 

 thrus diploxiphus (Giinther), apparently differing in the slender pre- 

 opercular spine, even caudal lobes, larger ventral and comparatively 

 shorter third anal spine. 



{Gracilis, slender; spina, spine.) 



Holocentlirus polynesise sp. nov. Fig. 3. 



Holocentrus poeciloptenis Fowler, Proc. Acad. Nat. Sci. Pliila., 1S99, p. 485. 

 Thornton Island, South Pacific (wrongly ascribed to Caroline Islands). 

 (C. D. Voy.) 



Head 2f ; depth 3 ; scales 49 in lateral line to base of caudal ; 4 scales 



Fig. 3. Holocentlirus polynesice Fowler. 



obliquely back from origin of spinous dorsal to lateral line; 3 scales 

 between middle of spinous dorsal and lateral line; about 6? series of 

 scales vertically between lateral line and middle of belly; width of 



