. Bulletin - United States National Museum. Science. 184 NATIONAL MUSEUM BULLETIN 202 Vol. 2 maxillary covered by preorbital; premaxillary protractile; jaws equal in length or nearly so; gill membranes joined to side of isthmus but mth a narrow free fold across it; head naked, except a few scales in a patch on upper part of opercle usually present; body scaled; all fins naked, except caudal fin scaled basally; lateral line complete; usually branched pectoral ray second from dorsal edge longest; dorsal rays VIII,12 to 14 almost always VIII,13; anal 111,10-13 almost always 111,11; pectoral
. Bulletin - United States National Museum. Science. 184 NATIONAL MUSEUM BULLETIN 202 Vol. 2 maxillary covered by preorbital; premaxillary protractile; jaws equal in length or nearly so; gill membranes joined to side of isthmus but mth a narrow free fold across it; head naked, except a few scales in a patch on upper part of opercle usually present; body scaled; all fins naked, except caudal fin scaled basally; lateral line complete; usually branched pectoral ray second from dorsal edge longest; dorsal rays VIII,12 to 14 almost always VIII,13; anal 111,10-13 almost always 111,11; pectoral rays ii,12 to 15; pores in lateral line 19 or 20+1 (rarely 2) +5 or 6 to base of caudal fin rays; 3 or 4 scales above lateral line to base of spiny dorsal and 9 or 10 scales below it to anus; pelvics 1,5; branched caudal rays 6+6; nostrils small, anterior one tubular, posterior nasal opening covered by a dermal flap arising from its anterior edge; interorbital space convex; teeth short on sides, uniserial, about 9 to 14 on each side in both jaws, usually tips curved a little posteriorly; middle pair of enlarged teeth on lower jaw fitting between the middle pair at tip of upper jaw when mouth is closed, these teeth obliquely slanting, not projecting straight forward; both lips plicate, this condition usually continuing on Figure 100.—Sketch showing the shape of the dark color bar in the pectoral fin of five species of Thalassoma: a, T. duperry (Quoy and Gaimard); h, T. lucasanum (Gill); c, T. lunare (Linnaeus); d, T. lutescens (Lay and Bennett); e, T. amblycephalus (Bleeker). KEY TO SPECIES OF THALASSOMA FROM THE MARSHALL AND SOUTHERN MARIANAS ISLANDS la. Color pattern consisting of about 6 or 7 blackish, wedge-shaped, vertical bars interspaces whitish; radiating from eye about 5 broad dusky bars (red when alive) alternating with pale ones (olive when aUve) of about same width; dorsal fin with a blackish median streak. T. hardwickei (Bennett) 16. Color pattern not as in
Size: 1659px × 1505px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
