NATURAL SCIENCES OP PHILADELPHIA. 437 



Zeus geometricus Mitchill (1818). 



Argyreiosus vomer Agassiz (1828, Syn. excl.) Cuvier (1829). Cuv. et Val. 



(1833). Giinther (1860) desc. excl. 

 Selene argentata Mindling (1832). 

 Argyreiosus triacanthus Swainson (1839). 



" mauriceii Sioainson (1839). 



" spixii Castlenau. 



This species which has heen so singularly unfortunate in its nomenclature 

 was first identified in nature by Mr. Brevoort, who published an excellent de- 

 scription and figure of it eleven years ago, which should have presented fur- 

 ther confusion ; it has nevertheless been overlooked, and the species has 

 been since by one author described as new, and by another been referred to 

 the Argyriosus vomer. It has been only noticed on the eastern coast at New 

 York. 



Genus ARGYRIOSUS Lacepede. 



Argyriosus vomer Lac. 

 Zeus vomer Linn. 



" niger Block. 



" rostratus Mitchill. 

 Argyriosus setifer Swainson. 



Found along the entire eastern coast south of Cape Cod. 



Argyriosus capillaris Dekay. 

 Zeus capillaris Mitchill. 

 Argyreiosus mitchilli Delcay. 



This species is readily distinguished by the filamentous prolongation of the 

 third, as well as second, dorsal spine. Its range appears to be co-extensive 

 with the foregoing. 



Subfamily CHLOROSCOMBRLN^E Gill. 



Genus CHLOROSCOMBRUS, Girard. 

 Micropteryx Ayassiz (nee Zeller). 



Chloroscombrus chrysurus, Gill. 

 Scomber chrysurus Linn. 

 Scomber chloris Block. 

 Micropteryx cosmopolita Agassiz. 

 Seriola cosmopolita Cuv. et Val. 

 Scomber latus Gronov. 

 Chloroscombrus cosmopolita Girard. 

 Chloroscombrus caribbaeus Girard. 



This species differs considerably in the vertical extension of the body with 

 age, it being much higher when young than when fully grown. 



Subfamily TEA CHYNOTIN^ Gill. 



TRACHYNOTUS (Lac.) Cuv. 

 Trachinotus Lac, (Trachynotus ovatus). 

 Caesiomorus Lac, (Trachynotus bailloni). 

 Acanthinion Lac, {Trachynotus ovatus.) 

 Baillonus Rafinesque ( Trachynotus bailloni)*. 

 Bothrolaemus Holbrooh. 

 Doliodon Girard. 



* Rafinesque Analyse de la Nature. This work is not at present accessible, but the 

 name Baillonus was doubtless introduced for the Caesiomorus bailloni of Lacepede. 



1862.] 



