Jordan and Evermann. Fishes of North America. 677 

 308. JORDANELLA, Goode & Bean. 



Jordanella, GOODE & BEAN, Proc. U. S. Nat. Mus., n, 1879, 177, (jloridfe). 



Body short, deep, compressed. Head short. Mouth small, very protrac- 

 tile, the lower jaw the longer; lips full. Jaws each with a single series 

 of rather broad, wedge-shaped, incisor teeth, the cutting edge of which 

 is deeply notched, usually trifid. Braiichiostegals 5. Gill openings nar- 

 rowed, the opercular membrane adnate to the opercle above. Dorsal fin 

 elongate, the number of rays 16 to 18, the first being a robust spine; 

 insertion of dorsal fin behind ventrals, in advance of front of anal, its 

 last ray behind the last of anal; dorsal fin riot greatly elevated; anal 

 fin shorter and smaller, similar in both sexes ; ventral fins small, with a 

 scale at base ; caudal fin rounded; pectorals short and small. Intestinal 

 canal rather long, 3 times length of body. Sexes similar. (Named for 

 David Starr Jordan.) 



995. JORDANELLA FLORIDA, Goode & Bean. 



Head 3| ; depth 2 to 2 ; eye large, 3i to 4. D. I, 14 to 16 ; A. I, 11 to 13 ; 

 scales 25 to 27-11 or 12. Body ovate, short, and deep, with elevated back, 

 deep caudal peduncle, and steep profile. Head moderate, flat and broad 

 between the eyes, its profile less steep than that of the back. Mouth small, 

 anterior, the lower jaw projecting. Scales moderate, the humeral scale not 

 much enlarged. Dorsal fin inserted midway between snout and base of cau- 

 dal, its first ray robust and spine-like, grooved behind, longer than the 

 diameter of the eye and about as high as the succeeding soft rays ; fins all 

 rather low, the ventrals reaching just past the vent. Scales with strong 

 concentric striae ; scales of side with occasional developed pores, some- 

 times forming 2 or 3 imperfect lateral lines. Color olivaceous ; sides orange 

 or brassy, with a broad steely-blue stripe along each series of scales ; 4 or 

 5 vague, diffuse, black vertical bars, most distinct in the young, nearly 

 obsolete in the adult ; a large, diffuse, dusky blotch on the sides below the 

 dorsal spine ; fins mostly dark, the dorsal barred or speckled in the males, 

 nearly plain in the females, sometimes a dusky blotch on its last rays ; 

 body and fins everywhere finely punctulate with black ; a dark bar below 

 eye. Length 2i inches. Streams and swamps of Florida; abundant. A 

 singular little fish having the aspect of a Centrarchoid.* Here described 

 from specimens taken by Dr. J. A. Henshall in San Sebastian River. 

 Herbivorous, at least in part. Specimens are recorded from San Sebas- 

 tian, St. Johns, Alligator, Withlacoochee, Hillsboro, Pease, and Myakka 

 rivers; also from Lake Monroe, Lake Jessup, Lake Tohopekaliga, and 

 other waters around Kissimee in Osceola County, Florida. 



Jordanellajloridx, GOODE & BEAN, Proc. U.S. Nat. Mus., n, 1879, 117, Lake Monroe, Florida. 

 (Type, No. 18062. Coll. Professor Baird); JORDAN & GILBERT, Synopsis, 328, 1883; WOOLMAN, 

 Bull. U. S. Fish Comm., x, 1890, 300, with good figure; LONNBEBG, 0fvers. Vet. Akad. Forh., 

 115, 1894. 



* " I do not know if it can be proper to talk about mimicry in this case, but Jordanella is cer- 

 tainly in coloration very much indeed similar to a small Chsenobryttus gulosus. Even the black 

 spot on the opercle flap of the latter corresponds very well to the black spot on the side of Jor- 

 danella, and as the head of the ' War-Mouth ' is BO much larger it is situated not much farther 

 back than in Jordanella. It is possible that through this likeness some fishes that feed on min- 

 nows can be cheated to believe that they have a war-mouth that is less delicious and maybe can 

 defend itself with mouth and spines before their eyes, instead of a harmless miunow." (Einar 

 Lonnberg, I. c., 115, 1894.) 



