Jordan and Evermann. Fishes of North America. 2227 



2552. GOBIUS BADIUS (Gill). 



Head 6 in total; depth 7. D.VI-1, 10; A. 1, 10; scales 50-18. Anterior 

 profile very oblique ; a line of pores above each eye ; 2 on upper ascending 

 margin of preopercle ; eye 4 in head ; interorbital space 3 in eye ; caudal 

 5 in total length ; pectoral 6. Color dark bay with a posteriorly straight 

 heavy dot in the center of each scale on back and sides above; head 

 plumbeous, with 2 livid blue bands from eye to upper jaw. (Gill). About 

 mouth of Amazon; not seen by us. (badius, bay color, dark red.) 



Euctenogobius badius, GILL, Ann. Lye. Nat. Hist. N. Y., vn, 1857, 47, Amazon. 

 Gobius bosci, SAUVAGE, Bull. Soc. Philom. Paris. IV, 44, 1880. 

 Gobius badius, EIGENMANN & EIQENMANN, I. c., 65. 



Subgenus GOBIONELLUS, Giraid. 

 2553. GOBIUS MICRODOX, Gilbert. 



Head 4^; depth 5. D. VI-13; A. 14; scales 62. Head and body com- 

 pressed, everywhere deeper than wide. Mouth at lower profile of snout, 

 nearly horizontal, the lower jaw extremely weak, broadly rounded ante- 

 riorly ; maxillary reaching vertical from hinder margin of pupil, nearly 

 % length of head. Teeth minute scarcely perceptible without the use of 

 a lens, those in upper jaw in a single series. Mandible with a close set 

 outer series of teeth, separated by an interval from an inner narrow band 

 of still smaller teeth. Interorbital space narrow, less than diameter of 

 pupil. Isthmus wide, the gill slits extending little below base of pecto- 

 rals. Scales minute and cycloid anteriorly and on belly, becoming larger 

 posteriorly; on sides they are everywhere ctenoid behind the middle of 

 spinous dorsal; belly wholly scaled; nape scaled forward nearly to 

 orbits, but with a narrow median naked streak running back to front of 

 dorsal; breast and sides of head naked. Dorsal fins not connected. 

 First 4 spines filamentous, the longest longer than head, reaching when 

 depressed to base of third ray of soft dorsal. Soft dorsal and anal simi- 

 lar, not high, the last rays riot extending beyond the base of caudal; 

 caudal lanceolate, much longer than head; pectorals and ventrals about 

 equal, reaching vent. Color nearly uniform light olive, with minute darker 

 punctulations which sometimes form darker margins to the scales; an 

 obliqne dusky streak on opercle; 3 or 4 oblique obscure dark cross bars on 

 spinous dorsal, and 4 or 5 on tail; ventrals with white pigment. Length 

 2 inches. San Juan Lagoon, west coast of Mexico. (Gilbert.) (juiKpoS, 

 small; 68 ov$, tooth.) 



Gobius microdon, GILBERT, Proc. U. S. Nat. Mus. 1891, 554, San Juan Lagoon, north of 

 Rio Ahom, Mexico. (Coll. Gilbert.) 



2554. GOBIUS SMARAGDUS, Cuvier & Valenciennes. 



(ESMERALDA.) 



Head 4; depth 5J to 51; eye 4 to 5. D. VI-11 or 12; A. 11 or 12; scales 

 39 to 42. Body moderately elongate, compressed; head not compressed; 

 the cheeks tumid; the snout short and abruptly decurved; mouth large, 

 little oblique; lower jaw slightly inferior; maxillary reaching to below 



