CENTRACION QUOYI. 187 



eye. Dorsals moderate, height greater than length of base; upper angles 

 broadly rounded, posterior slightly produced, hind margin concave; spines 

 strong, with long bases. Origin of first dorsal above middle of pectoral, middle 

 of base including spine above end of pectoral base. Distance between bases of 

 first and second dorsals nearly two and one half lengths of the base of the first. 

 Origin of the second dorsal above the tips of the ventrals, base distant one length 

 from origin of caudal. Fin angles more produced in old specimens. Anal small, 

 applied the tip of the fin reaches the subcaudal, origin little behind the end of the 

 base of the second dorsal, base distant one length from the origin of the caudal. 

 Pectorals broad, tip reaching the ventrals. Subcaudal short, about twice as 

 long as deep. 



Greyish or olivaceous brown with scattered spots of black, smaller than the 

 orbit to mere dots, over body and fins. On large specimens the spots are 

 sometimes absent or nearly so. Yellowish beneath. 



Snout longer on old males. 



West coasts of California and Mexico. 



CENTRACION QUOYI. 



Plate 47, fig. 1-3. 



Ceslracion quoyi Freminville, 1840, Mag. zool., ser. 2, 2, pi. 3; Gunth., 1870, Cat. fishes Brit, mus., 8, 



p. 416. 

 Ceslracion panlherinus Valenciennes, 1845, Voyage Venus, Zoology, pi. 10, f. 2; 1S55, ibid., Texte, p. 



350. 

 Tropidodus panlherinus Gill, 1862, Proc. Acad. nat. sci. Phil., p. 486. 

 Heterodontus (Ceslracion) quoyi Dumeril, 1S65, Elasm., p. 427. 



Heterodontus quoyi Maclay & Macleay, 1878, Proc. Linn. soc. N. S. W., 3, p. 316, pi. 26, f. 35. 

 Gyropleurodus quoyi Jord. & Everm., 1896, Bull. 47, U. S. nat. mus., p. 21; Regan, 190S, Ann. mag. 



nat. hist., ser. 8, 1, p. 494. 



Body cavity about one half of the total length in an eighteen inch female, 

 rather more stout than a specimen of C. zebra of equal length. Head one fourth 

 of the total, snout blunt, cheeks swollen, orbital ridges low, strong, somewhat 

 overhanging the orbits, not ending as abruptly as in C. francisci. E}^e small, 

 length of orbit less than 3 of orbital width of crown, less than one third of length of 

 snout. Spiracle small, below and slightly behind the orbit. Mouth narrow; 

 both jaws with labial folds, lower longer, widely separated behind the isthmus, 

 upper short, reaching little more than halfway to the narial valve; no fold 

 behind angles and labials. Anterior teeth tricuspid, except in very young; 

 molars elongate, narrow, with a longitudinal ridge; Symphyses much shorter 

 than those of C. philippi. On the teeth of the specimen figured on Plate 47, 



