. Fresh-water biology. Freshwater biology. Fig. 865. Corona oi Lacinularia socialis Ehr., to show the two wreaths of cilia. A, Dorsal view. B, Side view. (After Wesenberg-Luod.) Triarthra (Fig. 944), and Tetramastix (Fig. 945). These rotifers are the only ones that have corona and jaws hke those of the Meli- certidae, and they agree with them in many other particulars. Thus, all have two eyes, while most other rotifers have but one. In all there is either no foot, or it is a pecuKar one, lacking the characteristic toes. In Pterodina the foot ends in a bundle of ciUa, and this is likewise true
. Fresh-water biology. Freshwater biology. Fig. 865. Corona oi Lacinularia socialis Ehr., to show the two wreaths of cilia. A, Dorsal view. B, Side view. (After Wesenberg-Luod.) Triarthra (Fig. 944), and Tetramastix (Fig. 945). These rotifers are the only ones that have corona and jaws hke those of the Meli- certidae, and they agree with them in many other particulars. Thus, all have two eyes, while most other rotifers have but one. In all there is either no foot, or it is a pecuKar one, lacking the characteristic toes. In Pterodina the foot ends in a bundle of ciUa, and this is likewise true of the young of the Melicertidae. In. Fio. 866. Malleo-ramate jaws. A, Jaws of MeUcerla ringens Schrank. (After Weber.) B, Jaws of Pterodina caeca Parsons. (After Rousselet.) many MeHcertidae there is below the mouth a peculiar fold of in- tegument forming the so-called "chin" which plays a part in the formation of the pellets used for building the tubes. This chin is likewise found, in a slightly less developed condition, in Pedal- ion (Fig. 946, ch) and in Triarthra, while nothing of the sort is found outside the present group. The remarkable similarity of corona, jaws, eyes, and other features seems to demonstrate clearly that all these free-swimming rotifers are closely related to each other and to the 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 Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc. ,etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
