38o 



SNODGRASS AND HELLER 



92. ARCHOSARGUS POURTALESII (Steindachner). 



Sargus ^orfa/t^sn Stki'SDACHSER, Fische Afrikas, 39, 1881, Galapagos Islands. 

 Archosargtcs pourtalesii, Jordan & Bollmax, Proc. U. S. Nat. Mus. 1889, 



181 (Chatham Island). — Jordan & Evermann, Fishes North and Mid. 



Amer., 11, 1360, 1898. 



Range. — Galapagos Archipelago. 



We have 10 specimens all taken at Elizabeth Bay, Albemarle. The 

 Albatross obtained one specimen at Chatham. 



Body very deep, much compressed, dorsal profile evenly convex 

 from snout to base of caudal peduncle, a rounded elevation before 

 eyes; mouth much below the longitvidinal axis of the body, lower 

 profile evenly rounded but less convex than dorsal profile; pectoral 

 long and narrow, base as wide as eye, upper rays longest ; caudal 

 deeply forked ; dorsal spines all short, those back of the third, of 

 equal length, the first 3 shorter, the first shortest, the second and third of 

 equal length, the second much thicker than the third ; enlarged incisors 

 in front of jaws f, wide, flat, constricted at base; smaller molar teeth 

 on sides of jaws. 



Color in life. — Above and on sides metallic green-blue; sides with 

 7 longitudinal gold stripes, a black spot above base of pectoral; snout 

 mottled olive and brown, sides of head silvery-copper; underparts 

 white; iris golden-brown; pectorals light dusky; ventrals white, 

 dusky at tips; dorsal spines dark brown, membrane of spinous dorsal 

 amber, with bluish area basally back of each spine; anal brownish, 

 spines amber, membrane and rays pale ; caudal dusky. 



MEASUREMENTS, FIN RAYS AND SCALES OY ArchosargllS f0U7-- 



talesii. 



Length in mm 154 



Depth 46 



Head 1 26 



Pectoral 40 



Ventral 19 



Eye 19 



Number of dorsal spines XIII 



Number of second dorsal rays 10 



Number of second anal rajs 10 



Scales on lateral line I 46 



159 

 47 

 29 

 40 

 20 

 16 



XII 

 II 

 10 

 44 



147 

 50 

 28 



44 

 21 



17 

 XII 



II 

 10 

 46 



144 

 50 

 29 



43 

 20 

 16 

 XIII 

 10 

 10 

 49 



121 



52 

 28 

 42 

 21 



XIII 

 10 

 12 



44 



133 

 46 



28 



41 

 20 

 29 

 XIII 

 10 

 10 

 45 



Family GERRID^. 

 93. EUCINOSTOMUS DOWI (Gill). 



Diapteriis doivit Gill, Proc. Acad. Nat. Sci. Phila. 1863, 162, Panama. 

 Gerres dmni, Steindachner, Ichthyologische Beitriige (iv), Sitzb. der k. 



Akad. Wissensch., vol. lxxii, part I, Dec, 1875, 13 (Callao, Peru ; 



Galapagos Islands). 



