Jordan and Evcrmann. —Fishes of North America. 1431 



Johnius batabanm, Poey, Memorias, ii, 184, 1860, Batabano, South coast of Cuba- Poey 



Fauna Puerto- RiqueSa, 327, 1881. 

 Larinmsbatabanus, Jordan, Proc. U. S. Kat. Mus. 188G, 43. 

 Corvula hatabana. Jordan & Eigenmann, I. c, 380, 1889. 



579. ELATTARCHUS, Jordau & Evermann. 

 Elattarchus, Jordan & Evermann, Check-Li.st, 397, 1896 (archidium). 



This genus is very close to Bairdiella from which it differs in the presence 

 of slender canines, much as in Odontoscion. From the latter genus it differs 

 mainly in the serrate preopercle, which has a downward directed spine at 

 the angle. Second anal spine very small. One species known. {sXdrroov, 

 reduced; dfjxoi, anus, from the small anal tin.) 



1813. ELATTARl'HUS AlU HIDIUM (Jordan & Gilbert). 



Head 3 ; depth 3^. D. XI, 24 ; A. II, 8 ; scales 9-50-7, 52 pores. Diameter 

 of eye about equal to length of snout, or to iuterorbital width, and U 

 times in length of head. Length of maxillary 2^^ in head. Gilli-akers low 

 and slender, 6 + 13 in number. Pseudobranchia- well developed; poste- 

 rior nostril a, narrow oblong vertical slit. Head and body rather elon- 

 gate, considerably compressed, back not elevated, the snout somewhat 

 gibbous, the profile depressed above the eyes. IMouth very large, terminal 

 oblique, the nutxillary reaching vertical from posterior margin of pupil; 

 jaws subequal, premaxillaries in front on the level of lower edge of pupil; 

 symphysis of lower jaw with an oblong knob, which projects inward and 

 upward, on this are 2 series of teeth, 3 in each .series, the inner pair 

 being canines of moderate size, larger than any of the other teeth, but 

 much smaller and slenderer than the canines in Cynoscion. Both jaws 

 without villiform teeth, upper jaw with 2 series of slender-pointed 

 teeth, the outer series enlarged ; lower jaw laterally with a single series 

 of teeth similar to those of the outer series of upper jaw, but larger; those 

 in the middle of the jaw largest. Posterior margin of preopercle inclined 

 downward and backward, both margins convex and with the angle broadly 

 rounded. Both margins with weak, distinct serrations; posterior border 

 with 2 or 3 stronger teeth next the angle directed backward, the angle 

 with 1 robust flattish spine directed more or less vertically downward. 

 Spinous dorsal with very Aveak, flexible spines, the third the longest and 

 about i length of head ; soft dorsal moderate, the longest ray shorter 

 than the dorsal spines but more than ^ length of head; caudal fin sub- 

 truncate or slightly emarginate; anal fin very small, posteriorly inserted, 

 its base but little oblique; length of base about equal to length of snout; 

 second anal spine moderate, shorter than the first soft ray, much stronger 

 than the dorsal spines, and inflexible, its length about equal to snout and 

 ^ of eye, 3 in head; distance from front of anal to middle of base of 

 caudal slightly more than i the length of the body ; distance from vent to 

 front of anal about equal to length of base of anal; pectoral short, not 

 reaching tips of ventrals, its length If in head; ventrals reaching half- 

 way to front of anal, not nearly to vent; meml)ranes of soft parts of ver- 

 tical fins with series of scales extending more than halfway to the tips. 



