Jordan and Evermann. — Fishes of North America. 1693 



•2108. TKUTHIS BAHIANUS (Castelnati). 



(Barbeiro; Ocean Tang.) 



Head 3^ ; depth 2. D. IX, 24 ; A. Ill, 22. Outline ovate ; anterior profile 

 moderately convex, making angle of 45"^ with axis of body. Caudal 

 deeply emarginate, its upper lobe much the longer, in adult slender and 

 usually produced into a filament, the inner rays f length of outer rays 

 (in adult). Color dark brown, blotched with paler below, uo transverse 

 bars; brown, wavy, longitudinal streaks on sides of body; 8 dark lines 

 running parallel with edge of dorsal fin for its whole length and separated 

 by interspaces of same width; margin of caudal tin bluish with a violet 

 base; no distinct dark cross bar at base of caudal. Length 1 foot. West 

 Indies and neighboring coasts of tropical America from Key West to 

 Bahia; the adult easily known from related species by the form of the 

 caudal, the young by the fin rays and the markings; our specimens from 

 Key West and Bahia. (Name from Bahia.) 



Acanthurus hahianus, Castelnad, Anim. nonv. ou Rares de L' Amer. du Sud, 24, pi. 11, fig. 



1, 1855, Bahia ; Jordan, Proc. U. S. Nat. Mus. 1890, 323. 

 Acanthurus tractus, Poey, Memorias, n, 208, 1860, Cuba ; POEV, Eepertorio, 356, 1867 ; Jor- 



DAN & Gilbert, Synopsis, 941, 1883. 

 Aeronurug nigriculus, Poey, Enumeratio, 69, 1875, Cuba ; larval form. 

 Acanthurus matoides, Jordan Sc Gilbert, Proc. U. S. Nat. Mus. 1882, 626; not of Cuvier &. 



Valenciennes. 

 Teuthis tractus, Meek & Hoffman, I. c, 229, 1884. 



2109. TEUTHIS ALIALA (Lesson). 

 (Philosophe.) 



Head 3| ; depth 1| to If ; eye 3* ; maxillary 4J; in head. D. IX, 30 ; A. Ill, 

 26; from eye to corner of mouth 1:^ in head; gill opening 1\ in head; 

 opercle short aud obliquely set, 4^ in head; humeral bone striate. Body 

 ovate, strongly compressed, closely covered with small rough scales which 

 become shagreen-like on head; lateral line present but obscure; anterior 

 profile strongly convex above and before the eye, thence somewhat concave 

 and nearly vertical to the small projecting mouth. Teeth broad, digitate, 

 each with 4 or 5 claw-like serraj at tip ; lower teeth with the serric much 

 smaller, forming notches. Jaws very short, about e(|ual, about 10 incisors 

 in each. Anterior nostril moderate; clo.se to posterior, Avhich is much 

 smaller. Dorsal and anal low, continuous, rounded behind; longest 

 dorsal ray near end of fin, 21- in head; longest anal ray 2 in head; caudal 

 lunate, upper and lower angles produced, but acuminate and short, middle 

 rays 1^ in head, the outer 1 in head; caudal spine very strong, 2i in 

 head, attached near its posterior end, the short sharp posterior end free, 

 the long knife-like anterior portion slipping iuto a groove in the flesh; 

 pectoral long, J longer than head; ventrals 1?; in head. Color dark pur- 

 plish brown, almost black; a pale-yellowish or flesh-colored crescentic 

 area under eye; a ring of pearly whitish around mouth, not quite contin- 

 uous above ; a pale streak along dorsal fin, widening behind into a pale- 



