794 J'JiOCKEDIXdS OF THE NATIONAL MUSEUM. 



iiuiiirli))le luikcfl. Lower half of soft dorsal closeh' covered with fine 

 scaU^s f()ri)iin<4' a rather thick sheath. 



Third dorsal spine the longest, its length 2| in head; the succeeding 

 spines decrease rapidly in length, making the tin triangular. Pectoral 

 short. H i'l head, scarcely extending to tips of ventrals, which reach 

 two-thirds of distance from their base to front of anal. Second anal 

 spin(» stout, but not over three-fourths the length of first anal ray; 

 length of second spine 8 in head. Tips of anal rays reach to below 

 base of last dorsal ray. Caudal slightly S-shaped, the upper lobe the 

 longer; tip of low^er angle rounded. 



Color dark on sides and back; lower parts dirty silvery. A con- 

 spicuous, rather narrow, light ])and runs downward and slightly 

 o])li<iu(dy backward from ])etween the dorsals nearly to vent. A sim- 

 ilar short band runs from middle of soft dorsal, but does not reach to 

 lateral line. The opercle ends in a broad flap, which is coal black 

 nuich as in some of the centrarchoid fishes. The fins are all black. 



72. SCI/ENA DELICIOSA (Tschudi). 



This is the best represented Sciienoid fish in the collection. Many 

 specimens were collected at C-allao, and one at Molendo, Peru. 



Head, I2f to 3 in length to base of caudal; depth, 3| to 8|. Eye, 

 5i to 6 in head; interor])ital space, P>f ; snout, 3| to 4; maxillary, 3. 

 Dorsal, IX or X, J, '22 or 23; anal, II, 10. Scales, 50 (pores). 



Upper anterior profile forming an even curve from nape to snout. 

 Snout projecting beyond tip of mandibile in a variable degree as in 

 related species, or from i to 1 diameter of pupil. Viewed lateralh' its 

 profile usually forms a semicircle, ])ut in one or two specimens it-is a 

 little angulated at the tip. Gill rakers scarcely as long as diameter of 

 pupil; () + 12 or 13 in number. 



The fourth dorsal spine the highest, 2f in head. The last spine of 

 first dorsal is half as long as the spine of the second dorsal, and is 

 attached to it by a mend>rane. Tip of pectoral reaching 1 diameter 

 of eye past notch ))etween dorsals. Ventrals reaching one-half of 

 distance from their base to front of anal. Tip of anal reaching to 

 below l)ase of last dorsal ray. Caudal lunate. 



Color dusky on back, growing silvery on sides. Rather faint, dark 

 lines following the rows of scales; axil dark. 



73. SCIi^NA GILBERTI, new species. 



Plate LXVI, fig. ;!. 



Head. 3|" to 3| in length to base of caudal; (1 to 3| in entire 

 length); depth. 3f to 3^^. Eye, 9k to 11 in head; interorbital space, 



"The measurement appearing first is of the vsmaller of our two ppecimenp; where 

 only oiu' nieiiHuremcnt is >jrivon the speeiineus <1() not differ. 



