254 



MEMOIRS OF THE CARNEGIE MUSEUM. 



Fig. 26. Euthyopteroma virgatum (Houttuyn). (From Proc. U. S. N. M., Vol. XLI, p. 565). 



Family H.EMULID^. 



146. Therapon ocyrhynchus Temminck & Schlegel. 

 Okayama (Kusano and Otaki), No. 6273a-b; Osaka. 



147. Parapristipoma trilineatum (Thunberg). 

 Osaka, No. 6376a-b. 



148. Plectorhynchus pica (Cuvier & Valenciennes). (Plate XXX, fig. 2). 



One specimen No. 6018a, 100 mm. in total length, 73 mm. in length without 

 caudal, from Boshu, Japan. 



The color and proportions of this fish show the typical variations of the young 

 of these forms. The caudal is elongate and pointed, the spines high, and the color- 

 bands broad. The latter, as is known in allied forms, break up and disappear with 

 age, or become narrowed. Diagramma orientale Cuvier and Valenciennes (Hist. 

 Nat. des. Poiss., plate 124) shows almost identically the coloration of the present 

 specimen, but differs in showing thirteen spines and larger scales. Plectorhynchus 

 pica {Cf. Giinther, Fische Stidsee, Plate XXII, fig. A) corresponds very closely 

 with the present specimen in all particulars, save a deeper pre-orbital in the plate 

 given by Giinther, which is not accurate in proportions. We here describe and 

 figure our specimen, as it is apparently rare and not hitherto known from Japan. 

 Most members of this group have a wide distribution. 



Head 3.4 in body-length without caudal; depth 3.25; D. XII, 20; A. Ill, 7; 

 scales ninety-seven in series below lateral line, fourteen between latter and dorsal 

 insertion, twenty-two between lateral line and anal insertion; profile from snout to 

 dorsal insertion strongly arched, nearly straight along dorsal base; pre-orbital 

 depth two-thirds diameter of eye; snout 3 in head; eye 3 in head, equalling maxillary, 

 which reaches anterior border of eye; teeth in villiform bands in both jaws, outer 

 rows slightly enlarged; pre-opercle coarsely serrate. 



