. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. fl, addurtor; !<-. c. divaricator muscles; j, aeptiiniV, raoath; f, extremity of alimentary tube. Tjbpeduncular muscles bave been purposely omHtfO. 192 B R A C H P 0 D A. almost constantly in motion, and often seen to convey small particles to the channel at their base, and that the cirri are bent up when the brachial appendages are retracted, but are generally uncoiled and straightened when the shell is opened, before which the animal has often been observed to protrude a few of its cirri, and mo
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. fl, addurtor; !<-. c. divaricator muscles; j, aeptiiniV, raoath; f, extremity of alimentary tube. Tjbpeduncular muscles bave been purposely omHtfO. 192 B R A C H P 0 D A. almost constantly in motion, and often seen to convey small particles to the channel at their base, and that the cirri are bent up when the brachial appendages are retracted, but are generally uncoiled and straightened when the shell is opened, before which the animal has often been observed to protrude a few of its cirri, and move them about to ascertain if any danger threatened. In Rhynchonella, where the elongated spiral labial appendages are slightly supported only at their origin by two short calcareous processes, they can at the will of the animal, according to Owen and Morse, be unrolled and protruded to some distance beyond the margins of the valves, and when forcibly stretched out they are said to be more than four times the length of the shell, and to support \*, T<^-;^^^=:^i^ VCL^!!l!i<*N^7^e some 3000 cirri. We may mention, likewise, that Otto Frederick Miiller, having dredged from the Lake of Droe- Fig. 21. back in Norway, a lihynrhoneJlapaUtatea. Interior of dorsal
Size: 1669px × 1497px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1902
