358 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



15. Mugil brasiliensis Agassiz. 



2510, .'3003, 7G1G, Numerous small specimens, mostly in poor condition, 

 most or all of them belonging to tlie present species, 

 7090. Two large specimens in good condition. 



16. Sphyraena argentea Girard. 



(Sphyrwna lucamna Gill, Proc. Ac. Nat. Sci. Phila. 18G3, 88.) 



6353. (Types of Spliyrccna lucamna Gill.) Numerous young specimens, 

 in rather poor condition, none of them more than G inches long. They 

 agree in all tangible respects with Sphyrwna argentea. Lat. 1. about 142. 



17. Lepidopus caudatus (Euplir.) White. 



10115. One specimen, 10 inches long, in poor condition. 



18. Decapterus hypodus Gill. 



(Decajjterus hi/podus Gill, Proc. Ac. Nat. Sci. Phila. 1862, 2S1. 



4005. (Types oi Decapterus hypodus.) Four specimens, in good condi- 

 tion, G to 8 inches in length. This species is extremely closely related 

 to I)ecaj)terus macarellus (C. & V.) Gill, of the Atlantic coast, of which 

 it may well be taken as a geographical representative or variety. The 

 only ditterences which we are able to appreciate are the following: 



Body rather less slender in D. hypodus (depth 5^ instead of 5^) ; teeth 

 rather stronger (distinctly seen on lower jaw and tongue; scarcely to be 

 felt anywhere in D. macarellus); caudal armature stronger, about 30 

 plates baving distinct keels (not more than 25 in I), macarellus); lateral 

 line becoming straight more or less behind middle of trunk (near middle 

 of body in I), macarellus). 



It is possible that a large series would show that the two forms are 

 absolutely identical. 



19. Trachurus picturatus (Bowdich) J. & G. 



(Trachunis symmetriciis Gill, Proc. Ac. Nat. Sci. Phila. 18lr2, 2(51.) 



808G. Two specimens, in good condition, of the usual Californian type. 



20. Trachurus declivis (Jenyus) J. & G. 



0351=31014. A single immature specimen, about 4 inches in length, 

 evidently different from Caranx picturatus {symmetricus Ayres) and ap- 

 parently identical with Mediterranean specimens of the species we have 

 called Caranx decliris. Plates 3G-f 36, those on anterior part of lateral 

 line little lower than the others. Curve of lateral line If in straight 

 part. 



21. Caranx crumenophthalmus. 



{Tmchurops hmchijcMrm Gill, Proc. Ac. Nat. Sci. Phila. 1862, 261.) 



4007. (Types of Trachurops brachychirus.) Two specimens, in fair con- 

 dition, each 8 to inches in length. 



We are unable to detect any difference between this species and the 



