. Annual report. New York State Museum; Science; Science. virgula. We copy here his figure in illustration of his views. In specimens of Climacograptus caelatus from the Beekmantown shales at Summit, Nevada, Gurley has also observed a dilatation of the nemacaulus of which he says [1896, ]: Fig. 20 cllmaco. This bodv is an obtriangulate-cordate leaflet, bilater- Haii. uhabdosome with , J . , ° . 1-111 -1 dilatation. Copy from ally symmetrical, and traversed medianly by the virgula. Guriey Some appearances suggest that it may possibly consist of two superposed elliptic leaflets. It is someti
. Annual report. New York State Museum; Science; Science. virgula. We copy here his figure in illustration of his views. In specimens of Climacograptus caelatus from the Beekmantown shales at Summit, Nevada, Gurley has also observed a dilatation of the nemacaulus of which he says [1896, ]: Fig. 20 cllmaco. This bodv is an obtriangulate-cordate leaflet, bilater- Haii. uhabdosome with , J . , ° . 1-111 -1 dilatation. Copy from ally symmetrical, and traversed medianly by the virgula. Guriey Some appearances suggest that it may possibly consist of two superposed elliptic leaflets. It is sometimes at a distance from, sometimes close to, or in actual contact with the proximal ("distal") end of the polypary. From the (apparent) dilatations of the virgula seen in D. vesiculosus Nicholson, D. pal me us (Barrande) and D. trifidus Gurley, it differs markedly in its distinct bilateral symmetry, and flat leaflike appear- ance. This "disk" is present in a large proportion of the specimens. Gurley did not figure these disks in the preliminary publication from which this note is taken, but we have found in his manuscript some figures of the same made under his supervision, which are reproduced here [text fig. 21] ; and we add some camera drawings of our own to further illustrate certain features [text fig. 22]. A further form with a dilated nemacaulus was made known by Elles. 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 New York State Museum. Albany : University of the State of New York
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