662 Bulletin 47, United States National Museum. 



dark green ; sides with 10 to 14 narrow, pearly bands, slightly oblique, 

 and mostly narrower than the interspaces ; a diffuse, dusky blotch below 

 and behind eye ; lower jaw orange ; belly yellow ; dorsal and anal black- 

 ish, with many round, pale-blue spots; orange spots near base of fin; 

 caudal barred, with some pale spots ; ventrals dusky, tipped with yellow, 

 female greenish, with a faint, dark lateral shade and some pale cross bands ; 

 lower fins largely yellow ; upper mostly dusky. -Length 2 inches. Gulf 

 Coast, West Florida to Texas ; locally very abundant iu shallow lagoons; 

 an extremely beautiful little fish, here described from specimens from 

 Pensacola. (multifasoiatus, many-banded.) 



Adinia multifusdata, GIRARD, Proc. Ac. Nat. Sci. Phila., 1859, 118, Galveston; St. Joseph 

 Island, Indianola, Texas. 



Fundulus xenicus, JORDAN & GILBEKT, Proc. TJ. S. Nat. Mus., 1882, 255, Laguna Grande, Pen- 

 sacola, Florida; not Hydrargyra mullifasciata, LE SUEUR, nor Fundulus adinia, JORDAN & 

 GILBERT; the name multifasciatus preoccupied in Fundulus, but not in Adinia. (Type, Nos. 

 29668, 30821, and 30841. Coll. Jordan); JORDAN & GILBERT, Synopsis, 545, 1883. 



302. RIVULUS, Poey. 



Rivulus, POEY, Memoriae, u, 307, 18(50, (cylindraceus). 



Body rather elongate, subterete, covered with moderate-sized scales. 

 Mouth small, the upper jaw little protractile ; snout not produced. Each 

 jaw with a band of villiform teeth and an outer series of curved teeth. 

 Male with the anal fin not modified ; oviparous. No air bladder.* Small 

 fishes of the brooks of tropical America, the known species having in one 

 sex at least a large ocellated spot at base of caudal. Some of the species 

 recorded from Venezuela, Colombia, and Trinidad, may occur within our 

 limits, (rivulus, a rivulet.) 

 a. Scales small, about 40 in a lengthwise series; dorsal rays 8; anal 12. 



b. Insertion of dorsal midway between tip of caudal and center of eye; a black spot on 



opercle, besides the caudal ocellus of the male. CYLINDRACEUS, 973. 



bb. Insertion of dorsal midway between tip of caudal and edge of opercle; body marbled 



with light and dark spots; male with a caudal ocellus. MARMORATUS, 974. 



973. RIVULUS CYLINDRACEUS.f Poey. 



Head 3| in total length ; depth 5$ ; eye li in snout, 3 in head. D. 8 ; 

 A. 12 ; scales 40. Body slender, nearly terete ; head broader than trunk. 

 Mouth small, little protractile, the maxillary not reaching orbit ; teeth in 

 a band with an outer row of stronger ones. Dorsal well backward, behind 

 front of anal, its insertion midway between tip of caudal and center of 

 eye; ventrals short. Green, with violet shades; a large, black, eye-like 

 spot at base of caudal in male ; cheek with a green band, ending in a black 

 spot ; fins plain greenish or dull orange ; female with a black ocellus on 

 opercle, none on the tail ; sexes otherwise similar. Length 2 inches. 

 Havana. (Poey.) (cylindraceus, like a cylinder.) 



Rivulus cylindraceus, POEY, Memorias, n, 308, 1861, stream at Mordazo,near Havana ; GtiN- 

 THER, Cat., vi, 327, 1866 ; POEY, Anal. Soc. Esp. Hist. Nat., 247, 1880. 



* The character of the absence of the air bladder has not been verified in either of the follow- 

 ing species. 



fin Poey's figure of E. cylindraceus (1880), the mouth is represented as short and oblique. In 

 the figure in the Enumeratio (V, fig. 4) which Poey refers to Bivulus marmoralus, the mouth is 

 larger and nearly horizontal. 



