. The animal creation: a popular introduction to zoology. Zoology. CIREIPEDIA. 90- grown specimens on rooks and stones. In this stage the valves of the shell and of the operculum were visible, as well as the movements of the arms of the contained animal, although these last were not vet completely developed. The eyes, also, were still perceptible, but these gradiially disappear with the increasing opacity of the shell; and the animal be- comes blind for the remainder of its life. Thus, then, a creature originally free, capable of swimming about, and furnished with distinct organs of sight, bec
. The animal creation: a popular introduction to zoology. Zoology. CIREIPEDIA. 90- grown specimens on rooks and stones. In this stage the valves of the shell and of the operculum were visible, as well as the movements of the arms of the contained animal, although these last were not vet completely developed. The eyes, also, were still perceptible, but these gradiially disappear with the increasing opacity of the shell; and the animal be- comes blind for the remainder of its life. Thus, then, a creature originally free, capable of swimming about, and furnished with distinct organs of sight, becomes permanently and immoveably fixed, and its optical apparatus obliterated. The Cirripedes are divided into two families. The Barnacles (Lepas), (Fig. 181) are always found attached to some foreign substance by a long flexible peduncle, which pos-. FjG, 181.—BAESACLEa. sesses great power of contraction. Each valve of their shell is usually composed of two triangular pieces, and is closed at the back by an elongated plate, so that the whole shell consists of five pieces. They are very widely chssemiuated, and adhere to submarine. 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 Jones, Thomas Rymer, 1810-1880. London : Society for Promoting Knowledge
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Keywords: ., bookauthorjo, bookcentury1800, bookdecade1860, booksubjectzoology
