. Bulletin - United States National Museum. Science. 298 BULLETIN 93, UNITED STATES NATIONAL MUSEUM. The barnacle is conical, rounded or oblong, tliin, smooth, or with rounded ribs, not eroded, or but very slightly worn, covered with a thin cuticle; compartment easily separable from one another and from the surface of attachment; radii developed, narrow. Color very light bluish gray or olive brown. Carinorostral diameter, 5 mm.; lateral diameter, mm. Carino- rostral diameter, mm.; lateral diameter, imn. Scutum rather broad, the apical angle less than a right angle; the articular ri
. Bulletin - United States National Museum. Science. 298 BULLETIN 93, UNITED STATES NATIONAL MUSEUM. The barnacle is conical, rounded or oblong, tliin, smooth, or with rounded ribs, not eroded, or but very slightly worn, covered with a thin cuticle; compartment easily separable from one another and from the surface of attachment; radii developed, narrow. Color very light bluish gray or olive brown. Carinorostral diameter, 5 mm.; lateral diameter, mm. Carino- rostral diameter, mm.; lateral diameter, imn. Scutum rather broad, the apical angle less than a right angle; the articular ridge has a rounded outline, gradually tapeHng down- ward and upward. The adductor muscle pit is smaller than in stellatus, but deep; its tergal margin is straight and very slightly. Fig. 82. — Chthamalus feagilis. a, maxilla. 6, terminal segment of shorteu UAMU^ OF CIRItUS II. C, KLEVENTH SEGMENT OF CIRRUS VI. d, PART OF THE LABRUM, ALL FROM Albatross Station 2004. e, terminal segment of shorter ramus of CIRRUS II, Ocean City, N. J. f, Chthamalus stellatus, , tenth segment of cirrus VI. raised, so that there is the trace of an adductor ridge in some speci- mens. The exterior has conspicuous but very low growth-ridges, and usually a fine longitudinal striation. Tergum not varying much from that of typical stellatus, except that on account of the nearly perfectly preserved scutal margin, the articular ridge appears less prominent. There is a short, rounded and broad spur, decidedly more developed and broader than in ! stellatus. The labrum is strongly concave in the middle, and on both sides the edge is spinose (fig. S2d). The mandibles, palpi, and maxillae do not differ materially from those of O. stellatus, figured on page 303. Cirrus i has slightly unequal rami of 7 and 0 segments, armed with simple spines. Cirrus ii has slightly unequal rami of 7 and 5. Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada
Size: 1978px × 1263px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
