. Bulletin - United States National Museum. Science. DENDROID GRAPTOLITES OF HAMILTON, ONTARIO. 49 limestone at Hamilton is here reproduced in text figure 98 [59] by a pen drawing made under Gurley's supervision. In Plate II, figure 4 [text fig. 61] a portion of the same specimen which is partly weathered has been refigured to show the thecte. Where in unweathered specimens the perisark is partly broken away [as in text fig. 60], the circular sections of the composing tubes can be seen and the whole branch is found to be composed of apparently equal tubes. The rhabdosome, when moi'e complete t
. Bulletin - United States National Museum. Science. DENDROID GRAPTOLITES OF HAMILTON, ONTARIO. 49 limestone at Hamilton is here reproduced in text figure 98 [59] by a pen drawing made under Gurley's supervision. In Plate II, figure 4 [text fig. 61] a portion of the same specimen which is partly weathered has been refigured to show the thecte. Where in unweathered specimens the perisark is partly broken away [as in text fig. 60], the circular sections of the composing tubes can be seen and the whole branch is found to be composed of apparently equal tubes. The rhabdosome, when moi'e complete than in the specimens hitherto men- tioned, forms a dense mass of overlapping branches, which on account of the frequent dichotomies and later reapproachments of the branches assumes to some extent the aspect of a huge Desmograptus. We have been unable to see in any of our or Spencer's rhabdosomes the central axis which he asserts to have observed in a number of specimens, and we doubt, from the general structure of this form, that such a thing as a central axis existed. Horizon and localitij.—The type is from the Niagara shale of New York, and the specimen here floured (text fig. 59) from tlie same horizon at Hamihon, Ontario. Plesiotype.—C-Ai. No. 51281, INOCAULIS RAMULOSUS Spencer. Inocaulis ramulosa Spencer, Canadian Nat., X, 1882, p. , nomen nudum. Inocaulis ramulosus Spencer, Trans. Acad. Sci. St. Louis, IV, 1884, pp. 565, 588, 589, pi. 6, fig. 1; Bull. Mus. Univ. State Missouri. I, 1SS4, pp. 15, 38, 39, pi. 6, fig. 1.—(JuRLEY, Jouru. GeoL, IV, 1896, pp. 99, Fig. 63.—Inocaulis Spencer. Copy of Spencer's figure. The original description by Spencer is as follows: Frond consisting of numerous flattened bifurcating branches, originating in and radiating from a common radicle, composed of solid chitinous matter;. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colo
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