280 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



the two anterior bands joining on top of head, forming an inverted A, above 

 which is a dark -brown spot; on posterior half of body, extending from 

 dorsal to anal, but not on these fins, are finer bands of very dark brown ; 

 between each two bands is a parallel row of spots ; these are also five in 

 number; posterior half of body dark; caudal and peduncle abruptly light; 

 dorsal and anal plumbeous, each with an edging of black, which becomes 

 wider on posterior rays of each fin ; traces of bright orange near anterior 

 part of dorsal. 



Family ZANCLIDiE. 



45. Zanclus cornutus (Linnaeus). Twelve fine specimens from Clarion and Socorro 



islands. 



Family TEUTHIDID.33. 



46. Teuthis triostegus (Linnaeus). Abundant at Clarion and Socorro islands, where 



18 specimens were taken. 



47. Teuthis aliala (Quoy&Gaimard). Head3|; depth If to If; eye3^; maxillary 



6 in head; D. ix, 30; A. in, 26; from eye to corner of mouth 1J in head; gill- 

 opening 1£ i 11 head; opercle short and 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 seme at tip; lower teeth with 

 serraj much smaller, forming notches. Jaws very short, about equal, about 

 ten incisors in each. Anterior nostril moderate, close to posterior, which is 

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

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

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

 rays H in head, the outer 1 in head; caudal spine very strong, 2± in head, 

 attached near its posterior end ; the short, sharp posterior end free, the long 

 knife-like anterior portion slipping into a groove in the flesh ; pectoral long, 

 i longer than head ; ventrals 1£ in head. 



Color dark purplish-brown, almost black ; a pale yellowish or flesh-colored 

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

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

 pale orange patch, occupying two- thirds of height of last ray ; base of last 

 ray dusky ; anal marked in the same way as the soft dorsal ; a very narrow 

 pale edge to soft parts of dorsal and anal ; pectoral black ; caudal abruptly 

 pale at end of black caudal peduncle, with a curved dark streak parallel 

 with edge of fin and nearly the diameter of the eye behind it; behind this 

 a diffuse yellow area parallel with the dark streak ; fin behind with a narrow 

 pale edging; flap of opercle narrowly pale. 



Abundant at Clarion and Socorro islands, where 12 specimens were taken. 

 We can not distinguish our specimens from descriptions and figures of 

 Teuthis aliala (Acanthurus glaucopareius) of the East Indies. 



48. Xesurus punctatus (Gill). Two adults from Socorro Island. 



49. Xesurus clarionis (Gilbert & Starks). Twelve specimens from Clarion and 



Socorro islands. 



Family BALISTIDiE. 



50. Pachynathus capistratus (Shaw). Six specimens from Clarion and Socorro 



islands. 



51. Melichthys bispinosus Gilbert. Nine specimens from Socorro and Clarion 



islands. 



52. Xanthichthys mento (Jordan & Gilbert). Seventeen specimens from Clarion 



and Socorro islands. 



