. Secrets of earth and sea. Science; Natural history; Archaeology; Art, Primitive. SOME SPECIFIC CHARACTERS 123. side of the " head " a very minute gill far away from the others and previously unknown. The demonstrator in charge of the class refused even to look at her discovery. So she confirmed it by examining three other specimens âmade drawings of â the tiny branched gill (as shown in Fig. 33) and their position, and sent them to me in London. It was at once clear that she had dis- covered in this much studied little animal a very interesting pair of gills (right and left)â unkno
. Secrets of earth and sea. Science; Natural history; Archaeology; Art, Primitive. SOME SPECIFIC CHARACTERS 123. side of the " head " a very minute gill far away from the others and previously unknown. The demonstrator in charge of the class refused even to look at her discovery. So she confirmed it by examining three other specimens âmade drawings of â the tiny branched gill (as shown in Fig. 33) and their position, and sent them to me in London. It was at once clear that she had dis- covered in this much studied little animal a very interesting pair of gills (right and left)â unknown to Huxley and the rest of the zoological world. She proceeded to examine specimens of A. fluviatilis from various rivers of Germany and France and always found the new gill- Fig. 33.âThe rudimentary plume. She also showed (I gill-plume of a crayfish from supplied her with specimens at the Natural History Museum) that it was, on the other hand, absent from A. leptodactylus, A. pallipes, and all the foreign species (some from Asia) which are known, and she published an illustrated account of it in the "Quarterly Journal of Microscopical ; This tiny gill-plume is placed very far forward on each side of the body, the farthest point forward at which any gill-plume is found in any kind of prawn, shrimp or lobster, namely in the region where the first pair of jaw- legs is attached, so that there are three empty spaces between it and the rudimentary gill over the fifth pair of that part of the body-wall to which the first pair of jaw-legs (maxillipedes) is articulated. Found in the red-footed crayfish (Astacus fluviatilis) but in no other species of Astacus. It is one-fifteenth of an inch long. Drawn by Miss Margery Moseley in 1904. (" Quart. Journal of Microscopical Science,'' vol. 26 (1904-5).). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these i
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