. Bulletin - United States National Museum. Science. 206 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM D. IX, 19 or 20, ninth spine 1^ to 2}4 in head, first ray 1^ to 2^; A. Ill, 19, third spine 2^ to 23^, first ray ly^ to 2^; caudal slightly emarginate behind, points little exserted, truncate in young, l}4 to 13^; least depth of caudal peduncle 2J^ to 3; pectoral 1^; ventral 1J^ to 2, spines robust; caudal spine 3}^ to 4. Gray brown generally, variably more bluish gray in some examples, especially about head and costal region. Broad, blackish-brown band strongly contrasted, like all rest of si
. Bulletin - United States National Museum. Science. 206 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM D. IX, 19 or 20, ninth spine 1^ to 2}4 in head, first ray 1^ to 2^; A. Ill, 19, third spine 2^ to 23^, first ray ly^ to 2^; caudal slightly emarginate behind, points little exserted, truncate in young, l}4 to 13^; least depth of caudal peduncle 2J^ to 3; pectoral 1^; ventral 1J^ to 2, spines robust; caudal spine 3}^ to 4. Gray brown generally, variably more bluish gray in some examples, especially about head and costal region. Broad, blackish-brown band strongly contrasted, like all rest of similar dark color of back; band extends up above suprascapular region or along upper edge of back, gradually broadening until reaching front of caudal peduncle; a forward extension continued along median axis of tail from caudal. Fig. 10.—Variation of color markings of Paracanthurus theuthis (LAcftpfcDE) spine till nearly above pectoral base; with age this band slopes up to dark dorsal band with which it unites just behind suprascapular region; posteriorly dark area of back extends above and below as strongly contrasted border both along caudal peduncle and caudal fin, pale intervening cuneate area resulting yellowish buff. Iris dusky. Bases of dorsals and anals broadly grayish or light bluish with tinge of light brown, margins of fins broadly blackish. Pectoral grayish or blue-gray over greater basal half or more, dusky above, and hind margin broadly pale yellowish buff; young with uniform pale pectoral. Ventral pale hind edge little brownish. Mauritius to the East Indies, Philippines, Melanesia. 14269, 14620. Doc Can Island. January 7,1910. Length 74 to 153 mm. A1640. Philippines. Length 217 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United
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