. Bulletin - United States National Museum. Science. Fig. 1.—Wall of a Balanomorph barnacle. a, 0, AhM. p, p, PARIETES. T, T, EADn. PART OF THE SUEATH IS VISIBLE IN TUE ORIFICE. IN Balanus and many other genera TUE ros- trum AND EOSTROLATERAL COMPARTMENTS ARE CONCRESCENT, NOT SEPARATE AS SHOWN HERE (diagrammatic; after Daravtn).. Fig. 2.—o, Compartment with two radu, serving either as a eostrolateral or as a rostrum CONCRESCENT WITH THE ROSTROLATERALS, AS IN BALANUS. 6, LATERAL OR CARINOLATERAL COM- PARTMENT. C, CARINA OR ROSTRUM. LETTERS AS IN FiG. 1 (AFTER DARWIN). The upper ends of the pore
. Bulletin - United States National Museum. Science. Fig. 1.—Wall of a Balanomorph barnacle. a, 0, AhM. p, p, PARIETES. T, T, EADn. PART OF THE SUEATH IS VISIBLE IN TUE ORIFICE. IN Balanus and many other genera TUE ros- trum AND EOSTROLATERAL COMPARTMENTS ARE CONCRESCENT, NOT SEPARATE AS SHOWN HERE (diagrammatic; after Daravtn).. Fig. 2.—o, Compartment with two radu, serving either as a eostrolateral or as a rostrum CONCRESCENT WITH THE ROSTROLATERALS, AS IN BALANUS. 6, LATERAL OR CARINOLATERAL COM- PARTMENT. C, CARINA OR ROSTRUM. LETTERS AS IN FiG. 1 (AFTER DARWIN). The upper ends of the pores or tubes in the parietes are more or less extensively filled up with calcareous material, occasionally diifer- ing in color from that of the rest of the wall. In the genus TetracUta, inter alia, the outer lamina of the wall is ordinarily disintegrated and fugacious in adults, leaving a columnar or tessellated surface, fonned of the harder filling of the parietal tubes. The lateral edges of the radii are often provided with fine trans- verse ridges or septa, usually having denticulate edges. These fit. 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
