. Bulletin - United States National Museum. Science. 28 U. S. NATIONAL MUSEUM BULLETIN 202 length of depressed dorsal ; pelvic insertion to anal origin ; interorbital space to ; postorbital length of head ; length of longest pectoral ray to ; length of longest pelvic ray to ; all in length of head. Least depth of caudal peduncle to in its length. Bear of isthmus with usual notch and fleshy lobe on shoulder girdle; gill rakers long, slender, the longest equal to % eye diameter; maxillary extends past a vertical line through front of eye but not quite to one
. Bulletin - United States National Museum. Science. 28 U. S. NATIONAL MUSEUM BULLETIN 202 length of depressed dorsal ; pelvic insertion to anal origin ; interorbital space to ; postorbital length of head ; length of longest pectoral ray to ; length of longest pelvic ray to ; all in length of head. Least depth of caudal peduncle to in its length. Bear of isthmus with usual notch and fleshy lobe on shoulder girdle; gill rakers long, slender, the longest equal to % eye diameter; maxillary extends past a vertical line through front of eye but not quite to one through front of pupil; nasal openings separated by a dermal flap; pelvics inserted a trifle in advance of a vertical line through middle of length of depressed dorsal fin; anus in front of and close to anal fin origin, a little closer to caudal fin base than to pelvic insertions; gill rakers lacking on posterior sides of first, second, and on ventral. Figure 7.—Holotype of Spratelloides atrofasciaius Schultz ( No. 115099), from Tutuila Island, Samoan Islands, (Drawing by Aime M. Awl.) part of third gill arches; upper and lower lobes of caudal fin each with a pair of glandular scales, on both sides, that lack the black pigment as observed in delicatulus. Color in alcohol.—The most characteristic color mark is the blackish or silvery lateral band, the greatest width of which is contained twice in postorbital length of head; tip of snout, tip of lower jaw, operculum, dorsal surface of brain with black pigment cells; middorsal line with a double row of black pigment cells and ventral edge of abdomen pigmented; peritoneum dusky. (See also under Remarks.) Ecology.—This species was common in Bikini Lagoon and occurred in small compact schools but these did not join with the extensive schools of S. delicatulus that occurred around the anchored ships. S. atrofasciaius is a much smaller species than delicatulus. Males with enlarged testes were observed but females with ma
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