Other pedicellariae are scattered independently over the surface of the animal, but they are smaller than those forming the clusters and connected with the spines.
The pedicellariae on this Star-fish resemble large two-pronged clasps, arranged principally along the lower side.
The office of some of the pedicellariae is to remove waste from the excretory opening; this is passed down regular lines and dropped into the water, thus keeping the body clean.
The pedicellariaeare arranged, in some species, in circles around the [pg206] bases of the spines, and form groups over the dorsal surface.
The pedicellariae are sessile and so long and large as to be easily seen with the naked eye.
Thus there is no doubt that the pedicellariae are able efficiently to perform the function which we regard as their chief function.
In executing it the pedicellariae are the most active, the spines somewhat slower, and the feet very much slower.
Under such circumstances it may be observed that the pedicellariae also become active, and especially so near the surface of attachment as if seeking for pieces of sea-weed.
A further proof that this is at least one of the functions of the pedicellariae is furnished by a simple experiment.
The area affected is usually about half a square inch, although the pedicellariaeeven far beyond this area may bend over towards the seat of stimulation, which, however, from their small size they are not able to reach.
Similarly, if any part of the shell external to the circumscribed area be stimulated, the spines and pedicellariae within that area are not affected.
If we shave off the spines and pedicellariae (Fig.
The pedicellariae in their main features resemble those which occur in the Star-fish, though considerably larger, and the ambulacral system is constructed upon the same plan.
In certain genera of star-fishes, "the very combinations needed to show that the pedicellariae are only modified branching spines" may be found.
But, as far as structure is concerned, I can see no similarity between tridactyle pedicellariae and avicularia.
In this case the identity in nature between the arms of the pedicellariae and the movable branches of a spine, is unmistakable.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pedicellariae" in a variety of sentences. We hope that you will now be able to make sentences using this word.
