MCCULLOCH. 81 



CXXXV. Family Tkichiuridae. 



A. Caudal fin wanting, tail ending in a fine point. Trichiurus (2981. 



AA. Caudal fin present. Lepidopus (299). 



298. Trichiurus Linne, Syst. Nat. 10th. ed., 1758, p. 246 {Upturns). 



298a. T. coxn. Hair-Tail. Id. Ramsay & Ogilby, P.L.S. N.S.W. (2), 



ii., 1887, p. 562 (PI. xxxiv., an allied species T. lepturus). 

 Occasionally appears plentifully in deeper inlets along the coast. Length 

 4 feet. 



299. Lepidopus Gouan, Hist. Pise, 1770, p. 107 (youam). 



299a. L. caudatus. Frost Fish. Trichiurus caudatus Enphrasen, Stockh. 

 K. Vet. Akad. Nya Handl. ix.. 1788, p. 52, pi. 9, 2. L. caudatus Day, 

 Fish. Gt. Brit. & Irel. i., 1880-4, p. 156, pi. 51, 2 (PI. xxxiv.). 



Widely distributed in both hemispheres. A young example taken by the 

 trawlers is the only specimen recorded from the State. Length 6 feet. 



CXXXVI. Family Gempyllidae. 



A. Lateral line double; two separate rays behind dorsal and anal fins. 



hrdanidia (300). 

 AA. Lateral line single; 5-7 finlets behind dorsal and anal fins. Thyrsites (301). 



300. Jordanidia Snyder, F.U.S. Nat. Mus. xl., 1911, p. 527 (raptoria). 

 300a. J. solandri. King Barracouta. Gempylus solandri Cuv. & Val., 



H.N. Poiss. viii., 1831, p. 215. Rexea furcifera Waite, Rec. Cantb. Mus. 

 i. 3, 1911, p. 236, pi. Hi. (PI. xxxiv.). 

 A southern species, recently captured in 150 fathoms east of Sydney by 

 the State Trawlers. A valuable food-fish. Length 30 inches. 



301. Thyrsites Cuvier, R. Anim. 2nd. ed., ii., 1829, p. 200 (atun). 



301a. T. atun. Barracouta. Scomber atun Euphrasen, Stockh. Vet. Akad. 



Nya Handl. xii., 1791, p. 315. T. atun MoCulloch, Rec. Austr. Mus. 



xiii. 4, 1921, p. 139, pi. 24, 2 (PI. xxxiv.). 

 Visits the coast periodically in large schools. Length 4 feet. 



Suborders Teuthidoidea and Siganoidea. 

 A. Anal fin with two 2 or 3 spines (Teuthidoidea). 



B. Teeth in a single row in each jaw. Fam. Teuthididae (exxxviij. 



BB. Teeth in several rows, brush like. Fam. Zanclidae (exxxviii.). 



AA. Anal fin with 7 spines (Siganoidea). Fam. Siganidae (exxxix.). 



CXXXVII. Family Teuthidae (vel Acanthuridae Auct.). 



A. A single movable spine on each side of the caudal peduncle. Teuthis (302). 



AA. Three or more tubercles on the caudal peduncle. 



B. Three caudal tubercles. Xesurus (303). 



BB. More than three caudal tubercles. Prionurus (304). 



302. Teuthis Linne, Syst. Nat. 12th. ed., 1766, p. 507 (hepatus). 



This genus has been commonly called Acanthurus or Hepatus. It has no 

 affinity with Teuthis of most authors, which now must be known as Siganus. 

 A. Body light, with dark cross bands. triostegus (300a'. 



AA. Body dark, with narrow wavy lines. grammoptilus (300b). 



