. Bulletin - United States National Museum. Science. Fiu. 07. -Balanus evermannIj one-half natuual size, a, NEAK Bering Island, SiMUSHiK Island, No. 38G02. b, NEAR deep and narrow, the sides partly folded in. The spur is narrow, separated from the basiscutal angle by twice its own width. Articu- lar ridge moderate. There are small crests for the lateral depressor muscles. The compartments are strong, rather thick, but very weakly ce- mented together. The carina is recurved, but the other compartments usually curve inward at the orifice. The parietes of the carinolaterals are always very narrow
. Bulletin - United States National Museum. Science. Fiu. 07. -Balanus evermannIj one-half natuual size, a, NEAK Bering Island, SiMUSHiK Island, No. 38G02. b, NEAR deep and narrow, the sides partly folded in. The spur is narrow, separated from the basiscutal angle by twice its own width. Articu- lar ridge moderate. There are small crests for the lateral depressor muscles. The compartments are strong, rather thick, but very weakly ce- mented together. The carina is recurved, but the other compartments usually curve inward at the orifice. The parietes of the carinolaterals are always very narrow—less than half as wide as those of the laterals. The radii are wide or moderate, Avith very long, steeply sloping, smooth summits; sutural edges not denticulate. The ala; are extremely wide, summits strongly oblique; their surfaces are smooth and nude, except for the distal triangles, which often retain the epidermis; edge without septa or denticles. The sheath is glossy above, its lower edge hanging close to the wall, leaving narrow cavities. Be- low it the parietes are almost smooth, except close to the base, where they become very closely and acutely ribbed, the ribs flattened and. 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 States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
