254 MEMOIRS OF THE CARNEGIE MUSEUM. 
Fig. 26. Euthyopteroma virgatum (Houttuyn). (From Proc. U.S. N. M., Vol. XLI, p. 565). 
Family HASMULID. 
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 Siidsee, 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. III, 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. 
