I CUT': YOLOCrCAL MISCELLANEA. 
27 
Japanese genera of Platycephalic!®. Comparison of this with the key to 
Japanese “ Thysanophrys ” given by Jordan & Richardson years before shows 
that characters regarded as specific in 1908 prove on closer analysis and 
elaboration to be generic in 1925. 
Subgenus REPOTRUDIS nov. 
Orthotype, Platycephalus macracanthus Bleeker. 88 
Interorbital space less than vertical diameter of eye. Upper preopercular 
spine enlarged, about equal in length to longitudinal diameter of eye. Anterior 
third of lateral line with distinct upstanding spines. 
Family OSTRACIUUE. 
Genus TRIORUS Jordan & Hubbs, 1925. 
Triorus Jordan & Hubbs, Mem. Carneg. Mus. x, 2, June 27, 1925, pp. 96 and 256. Orthotype, 
Lactophrys trilropis Snyder. 
The nearest allies of this genus are the Ostraciiclse with three-angled 
carapaces. Tetrosornus Swainson 89 has only one spine on the back. Lactophrys 
and Mhinesomus Swainson 911 have no spines on back and more than nine 
dorsal and anal rays. 
Triorus reipublicse (Ogilby). 
(Plate I, fig. 2.) 
' Ostracion concatenatin' Bleeker, Versl. Med. Kon. Akad. v. Wet. Afd. Natuurk xv, 1863, p. 443, 
and Nederl. Tijdschr. Dierkunde ii, 1S65, p. 68 (Port Jackson). Id. Gunther, Cat. Fish. 
Brit. Mus. viii, 18/0, p. 259 ( N . S. Wales specimen only). Not Ostracion concatenatus 
Bloch, Nat. ausl. Fische i, 1 785, p. 101, pi. cxxxi, a West Indian species without spines on 
carapace. 
Lactophrys concatenatus Waite, Mem. N. S. Wales Nat. Club, ii, 1904, p. 57 (N. S. Wales— listed 
only). 
Lactophrys reipublicoe Ogilby, Mem. Qld. Mus. ii, Dec. 10, 1913, p. 92. New name for Ostracion 
concatenatus of Australian authors (not Bloch). 
Lactophrys stellifer Jordan & Thompson, Mem. Carneg. Mus. vi, 1914, p. 268. Note that Sydney 
specimen differs from L. tritropis Snyder from Japan. Id. Jordan, Tanaka, & Snyder, 
Journ. Coll. Sci. Imp. liiiv. Tokyo xxxiii, 1913, p. 431 (Sydney and Lord Howe Is.). 
Id. McCulloch, Austr. Zook ii, 1922, p. 127 (not fig-). Not Ostracion stellifer Bloch & 
Schneider, Syst. lehth. 1801, p. +99, pi. xcviii, which has four strong spines on lateral 
ridge ; described from “America” but probably from Fast Indies or Japan. 
Triorus stellifer McCulloch, Austr. Mus. Mem. v, 1929, p. 423. 
D. 9 ; A. 9 ; P. i/10 ; 8 branched rays in caudal. 
Eye (12 mm.) 1-6 in snout (19) or 1-2 in interorbital (15). Opening of 
carapace around mouth (9) 2-7, gill-slit (6-5) 3-8, pectoral (15) 1-7 in head (25) 
which is 2-8 in length of carapace (71), measured from tip of snout to anterior 
88 Bleeker, Versl. Akad. Amsterdam (2) iii, 1869, p. 253. Amboina. 
89 Swainson, Nat. Hist. Classif. Fish. Amphib. Kept, ii, July, 1839, pp. 194 and 323. Name 
emended to Tetrosornus by Agassiz (Nomencl. Zook, Index Um'v., 1846) who notes that there 
is a genus of microbes named Tetrasomt Corda, Alman. Caiisb., 1839. 
Swainson, Nat. Hist. Classif. Fish. Amphib. Kept, ii, July 1839, pp. 194 and 324. 
