342 PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



half head. Origin of anal under middle of dorsal, its base a little 

 longer than head. Caudal short, the lower lobe longer than the upper; 

 the median rays about one-third the longest. Pectorals three-fifths 

 length of head, nearly or quite reaching base of veutrals, which are 

 short and do not reach the vent. Scales moderately adherent ; dorsal 

 sheath very low ; that of anal fiu higher. 



D. 12; A. 27; Lat. 1. 36 + 2; L. transv. 6. Depth, 3| in body; head, 

 3A; eye, 3 in head; B. 11-12. 



Color : Body translucent ; scales with a silvery luster ; dorsal region 

 much punctate with black and with some yellow speckling which broadly 

 covers the margins of the scales ; a distinct dark median line, comi30sed*of 

 minute dark specks, along entire length of back; sides with a rather dif- 

 luse silvery band, broadest anteriorly, becoming very narrow on caudal 

 peduncle, then expanding to base of fin ; it covers less than one row of 

 scales, and is narrower than diameter of orbit ; top of head, symphysis of 

 lower jaw, and snout, with much black speckling, the snout yellowish; 

 anal flu thickly speckled at base; anterior rays of dorsal and anal, and 

 lower rays of caudal, with some faint greenish-yellow and more or less 

 black dotting; tip of caudal blackish, more distinctly so at end of lobes. 



Common in the harbor of Mazatlau and called Sardina in common 

 with the other species of this geims, and Clupea stoUfera. It reaches a 

 length of 4 to 5 inches. The many types are numbered 28121 in the 

 United States ^N'ational Museum. 



5. Stolephorus exiguns, sp. nov. (281)10.) 



Allied to S. curtus, but with much slenderer body and shorter anal 

 fin. 



Body not greatly compressed and not elevated; belly compressed, 

 subcarinate, serrulate; head rather short, its height at nape more than 

 two-thirds its length ; opercular margin not much oblique ; cheek nar- 

 rowly triangular ; snout longer than two-thirds diameter of orbit ; eye 

 large, three and one-fourth in head; maxillary tapering to an acute 

 point, reaching to or nearly to opercular margin; teeth present in both 

 jaws ; in the lower minute and developed on anterior half only; in upper 

 jaw small, but easily perceptible. Gill-rakers short, the longest not more 

 than one-half diameter of orbit. 



Origin of dorsal fin midway between base of median caudal rays and 

 middle of pupil ; base of fin but little more than one-half length of 

 head. Origin of anal under anterior third of, dorsal fin; its base about 

 four-fifths length of head. Caudal short, not nearly equaling length 

 of head. Pectorals not nearly reaching ventrals. 



Scales very deciduous. 



D. 12; A. 17; L. lat. 38; L. transv. 5. Head, Sf in length ; depth, 5. 



Color translucent; scales \nih silvery luster; a faint silvery streak 

 along sides, widest and most distinct posteriorly, becoming taint ante- 

 riorly, and usually disappearing before reaching head. Scales on back 



