OCR Text |
Show 62 MR. C. TATE REGAN ON [May 12, about 24- times in that of head. Sc. 43-46 J^, extending on head to posterior margin of eye, 4 rows between soft dorsal and lateral line. 5-7 dark vertical bars on upper part of body, extending on to dorsal fin; a light area on lower part of body in front of anal; a pair of conspicuous black spots on base of caudal. Diagnosis based on four examples (including the types of C. dispihorus) from the W . Indies, the largest 98 m m . in total length. The smaller size of the specimens described makes it still more notable that the eye is smaller and the mouth extends farther back than in S. auriga, whilst other differences are sufficiently numerous. PRISTIPOMATIL\E. Diagramma cavifrons Cuv. & Val., from the coast of Brazil, has been redescribed by Boulenger as D. goeldii; this was doubtless due to Giinther having erroneously placed this species in Pristipoma, so that it appears from the British Museum Catalogue that the genus Diagramma is exclusively Indo-Pacific. The synonymy of this species is as follows :-• Diagramma cavifrons Cuvier k, Valenciennes, v. p. 290, pi. 123 (1830). Pristipoma cavifrons Giinther, Cat. i. p. 286 (1859). Genyatremus cavifrons Gill, Proc. Ac. Nat. Sci. Philarl. 1862, p. 256. Genyatremus luteus * Jordan & Fesler, Proc. Ac. Nat. Sci. Philad. 1889, p. 504 ; Jordan &, Evermann, Fishes N. A m . ii. p. 1342 (1898). Diagramma goeldii Boulenger, Ann. Mag. Nat. Hist. (6) xx. 1897, p. 294. M Y L A C R O D O X , gen. nov. Body compressed. Scales moderate, cycloid ; lateral line complete, concurrent with the dorsal profile, the tube straight, not extending the whole length of the scale. Mouth moderate, protractile ; the maxillary slipping for most of its length under the praeorbital, exposed distally, without supplemental bone. A series of conical teeth in each jaw, posteriorly becoming shorter, rounded and molar-like ; internal to these anteriorly one or two series of small rounded molars; no teeth on tongue or palate. Head scaly ; nostrils close together, rounded, the anterior largest; no pit below the chin; praeoperculum serrated; operculum not spinate. Gill-membranes united far forward, free from the isthmus; seven branchiostegals ; pseudobranchia? present; gill-rakers rather short. Two dorsals continuous at the base, with XI, I 13 rays; anal with III 10 rays; both with a scaly sheath at the base. Pectorals asymmetrical, with 18 rays, the upper rays longest ; ventrals below pectorals, each with a strong spine and a scaly axillary process; caudal emarginate. * The identity of this species with Lutianus luteus Bloch is extremely doubtful. |