552 PROCEEDINaS OF THE NATIONAL MmEllM. vol. xxv. 



a. Caudal sjiine small; Iwclj- light gray, with ahont six cross bars, narrower than 

 the interspaces; end of caudal peduncle with two black sjwts; dorsal rays 



about IX, 23; anal III, 21 trioslegm, 20. 



an. Caudal spine strong; body dark brown, uniform, or with faint bluish streaks; 

 dorsal rays about IX, 26; anal III, 24. 

 h. Axil of donsal and anal fins without black sjiot; body and fins with faint 



streaks (irgenteua, 21 . 



hh. Axil of dorsal and anal fins with a jet black spot; lips l)lack; Ixxly and fins 

 almost i)lain dark ))rown hipnudafus, 22. 



20. TEUTHIS TRIOSTEGUS (Linn^us). 



8HIMADAI: (STRIPED PERCIII.) 



Chretodon iriostegns Linn.eus, Syst. Nat., 10th ed., 1758, p. 274; India. 

 Acanthurus trloMegus Cuvier and Valenciennes, Hist. Nat. Poiss., X, 1835, 



p. 197.— (itJNTHER, Cat. Fish., Ill, 1861, p. 327; Amboina, Celebes, Aneitum, 



Australia, Malayan Archipelago. — Ishikawa, Prel. Cat., 1897, p. 34; Oga- 



sahara (Bonin Islands). 

 Chsetodon zclyra Lacepede, Hist. Nat. Poiss., Ill, 1802, p. 25, fig. 3; no locality. 

 Acanlhiiriix zi-hra Lacepede, Hist. Nat. Poiss., IV, 1803, p. 546, pi. vi, fig. 3; no 



locality. 

 Chsetodon couagga Lacepede, Hist. Nat. Poiss., IV, 1802, p. 727; no locality. 

 Teuthis australh Gray, in King's Narr. Survey Coast of Australia, II, 1826, 



p. 435; west coast of Australia. 

 AeanthuruH hh'undo Bennett, Ceylon Fishes, 1830, p. 11, pi. xi; Ceylon. 

 AcantJturus suhaniuitus Bennett, Whaling Voyage, II, 1840, p. 278; Society 



Islands. 

 Harpvrus f<(fin(itus Forster, Desc. Anim., Ed. Licht., 1844, p. 216. 



Head 3| to 4; depth 1| to 2; eye 2^ in snout. D. IX or X-22 or 

 23; A. 111-20 to 22. Bod}^ ovate, anterior profile gentl}' curved, 

 most convex over eyes; snout somewhat produced, concave above. 

 Dorsal fin moderate, anterior spines more or less concealed in the skin, 

 the longest spines al)out equal to the snout, the soft rays equal; first 

 anal spine very short, the third longest, about equal to the longest 

 dorsal spines; soft portion of anal about as high as the third anal 

 spine; caudal slightly lunate, the lobes Imt little produced; pectorals 

 about as long as head; ventrals as long as snout, including the eye. 

 Color in life dark greenish or slaty above with j^ellowish cloudings; 

 chin, belly, throat, and a narrow strip along base of anal white; ver- 

 tical tins dusky; anal with a narrow white margin; pectorals plain; 

 ventrals white on under surface; sides with 5 black bars, each wider 

 than the e3'e, the first, beginning just in front of the branchiostegals, 

 extends upward and backward across cheek through eye and to median 

 line of back, where it meets its fellow from the other side, is narrower 

 than the e3^e; the second begins at front of dorsal tin and extends down- 

 w.ai'd to base of pectoral, from which point it is continued downward 

 in a narrower line beginning on base of pectoral and ending just above 

 base of ventral; the third begins near l)ase of sixth dorsal spijie and 

 extends acro.ss side to belly at a point midway between auusaixd begin- 



