480 BULLETIN 189, UNITED STATES NATIONAL MUSEUM 

 REMORA REMORA (Linnaeas) 



Echeneis remora Linnaeus, 1758, p. 260, "in Pelago Indico" (diagnosis). 

 Remora remora Regan, 1913, p. 280, Lobos de Tierra, Peru. — Meek and Hilde- 

 BRAND, 1928, p. 898 (synonymy; description; range). 



No specimens are included in the collections studied. The species 

 has been reported from Peru by Regan (see reference above) from a 

 single specimen attached to "a large ray" captured at Lobos de Tierra. 

 A diagnosis is included in the preceding key. 



Range. — Warm seas. 



REMORA CLYPEATA (Gttnther) 



Echeneis clypeata Gunther, 1860, p. 401, "Cape Seas" (original description); 1861, 

 p. 376, "Cape Seas" (reference; description; discussion of relationship with 

 albescens Temminck and Schlegel). 



Remora clypeata Regan, 1913, p. 280, Lobos de Tierra, Peru. 



No specimens are included in the collections studied. The species 

 has been reported from Peru by Regan (see reference above), from 

 two examples attached to "a large ray" with the one of the preceding 

 species. A diagnosis is included in the foregoing key. Barnard 

 (1927, p. 421) synonymized R. clypeata with R. albescens (Temminck 

 and Schlegel). 



Range. — South Africa and South America (Peru) and, if identified 

 with R. albescens, Indo-Pacific to Baja California and Peru. 



Family BALISTIDAE: Triggerfishes 



Body ovate to somewhat elongate, considerably compressed; snout 

 long; eye placed high; mouth small, usually terminal; jaws strong; 

 teeth in a single series, incisorlike to more or less conical; gill open- 

 ings reduced to mere slits; skin leathery, covered with more or less 

 platelike scales, bearing spines or bony tubercles; dorsal fins two, the 

 first composed of two or three spines, the first one large, locked when 

 erect by the ball of the second one slipping into a socket under base 

 of the first (forming a trigger) ; second dorsal well separated from the 

 first, with rather numerous soft rays, similar to anal; ventral fins 

 replaced by a single stout median spine, attached to an enlarged 

 pelvic bone. 



Two genera have been reported from Peru. 



KEY TO THE GENERA 



a. Gill slit followed by several enlarged bony plates Balistes (p. 480) 



aa. Gill slit surrounded by ordinary scales, not followed by enlarged bony plates. 



Canthidermis (p. 482) 



Genus BALISTES Linnaeus, 1758 



Body deep, compressed; snout long, generally pointed; eye small, 

 placed near upper outline of head; teeth in jaws large, irregular, usu- 

 ally notched; gill opening an oblique slit, followed by enlarged bony 



