544 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41. 



The South American genus Isacia eTordan and Fesler (Isacid 

 conceptionis) is closely related, differing mainly in the long anal 

 (III, 13), which has a shght scaly sheath. 



(napd near; Pristipoma, an allied genus properly called Pomadasis.) 



10. PARAPRISTIPOMA TRILINEATUM (Thunberg), 

 ISAKI. ISSAKI, ISAGI. 



Perca trilineata Thunberg, Beskr. 2 nya Fiske, Kongl. Vet. Acad, nya Handl., 

 vol. 14, 1793, p. 55, jjl. 1, fig. 2 (Nagasaki, Japan). 



Parapristipoma trilineatum Bleeker, Arch. Neerl. Soc. floll. Sci. Harlem, vol. 8, 

 1872, p. 4 (Kiusiu and China). 



Pristipoma japonicum Cuvier and Valenciennes, Hist. Nat. Poiss., vol. 5, 

 1830, p. 288 (Japan). — Temminck and Schlegel, Fauna Japonica, 1843, p. 60, 

 pi. 26, fig. 2 (southwest coast of Japan). — Richardson, Ichth. China and Japan, 

 1846, p. 228 (China).— Bleeker, Vierde Beitr. Verh. Kon. Nat. Ver. Neder. 

 Ind. (Act. Soc. Reg. Scieut. Ind. Neerl.), vol. 3, 1857, p. 14 (Nagasaki).— 

 GuNTHER, Cat. Fish. Brit. Mus., vol. 1, 1859, i>. 303 (Chinese seas) .—Nystrom, 

 Jap. Fisksaml., K. Svenska Vet. Akad., vol. 13, Afd. 4, 1887, No 9, p. 9 

 (Nagasaki). — Steindachner and Doderlein, Beitr. Fische Japan's II, Denk- 

 schr. kais. Akad. Wiss. Wien, vol. 48, Abth. 1, 1883 (Tokyo). 



Diagramma japonicum Bleeker, Nalez. Ichth. Japan, Verh. Bat. Gen., vol. 25, 

 1852, p. 31, pi. 17, fig. 1 (Japan). 



Diagramma aporognathus PiEGAN, Ann. and Mag. Nat. Hist., ser. 7, vol. 16, 1905, 

 p. 18 (Inland Sea of Japan). 



Habitat. — Coasts of Japan and China. 



Described from 35 specim.ens from Tokyo, Misaki, Enoshima, 

 Wakanoura, and Nagasaki, from 30 to 295 mm. in length. 



Head 3 J in body; depth 3 to 3J; eye 4 in head; maxillary 3; pre- 

 orbital width 2| in eye; interorbital, 3 in head; snout equal to inter- 

 orbital width; dorsal rays XIV, 17; A. Ill, 8, Scales above lateral 

 line 106 to 115, below 85, between lateral line and spinous dorsal 12, 

 between lateral line and anal 17; between insertions of dorsal and 

 anal ^f . Gill-rakers 16 + 24. 



Dorsal profile more highly arched than ventral, that of head nearly 

 straight; caudal peduncle 2^ times as long as deep. Snout rounded, 

 rather short; mouth strongly oblique, lower jaw sli*;htly projecting; 

 maxillary ending under anterior border of eye, not all sheathed by 

 preorbital; eyes set low, leaving interorbital area high and arched. 

 Teeth feeble, minute, present on jaws only, in a narrow band ante- 

 riorly, a single row posteriorly. Preopercle with fine serrae nearly 

 same in strength as teeth. Opercle with spines almost lacking. 

 Gill-rakers slender, their length half diameter of eye. 



Dorsal spines flexible, low, first inserted over point of opercle; 

 fourth, fifth, and sixth longest, 2^ in head, last equal to eye. Dor- 

 sals not divided, rays not appreciably higher than last spine. Anal 

 spines stout, long, third 2| in head, slightly shorter and weaker than 

 the second, first very short, 2^ in eye; first anal rays one-fifth longer 

 than third spine, last one-half first; margin of fin straight. Pectoral 



