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II.—Note on Some Appendages of the Trilobites1

Published online by Cambridge University Press:  01 May 2009

Chas D. Walcott
Chas D. Walcott
Affiliation:
Palæontologist to the United States Geological Survey; Smithsonian Institution, Washington, D.C., U.S.A.
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Extract

The results of Mr. W. S. Valiant's long search for the appendages of Trilobites have recently been made known by Mr. W. B. Matthew, who described the material sold to the Columbia College of New York by Mr. Valiant. Mr. Valiant informs me that he discovered traces of what he considered to be antennæ, and that for several years he continued collecting until he found a locality where the specimens were well preserved and showed, not only the antennæ, but legs and what he supposed to be the swimming appendages.

Type
Original Articles
Information
Geological Magazine , Volume 1 , Issue 6 , June 1894 , pp. 246 - 251
Copyright
Copyright © Cambridge University Press 1894

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Footnotes

1

Read before the Biological Society of "Washington, March 24, 1894.

References

page 246 note 2 Amer. Journ. Sci. 1893, vol. xlvi. p. 121.Google Scholar

page 247 note 1 Amer. Journ. Sci. 1893, vol. xlvi. pp. 467–470.Google Scholar

page 247 note 2 The Trilobite; New and Old Evidence Relating to its Organization. Bull. Mus. Comp. Zool. 1881, vol. viii. p. 6.Google Scholar

page 247 note 3 Bull. Mus. Comp. Zool. 1881, vol. viii. p. 191–224.Google Scholar Science, 1883, vol. iii. p. 279.Google Scholar

page 248 note 1 Loc. cit. pl. iv. fig. 5.

page 249 note 1 Text Book of Comparative Anatomy, English Ed. 1891, p. 415.Google Scholar

page 249 note 2 Loc. cit. p. 421.Google Scholar

page 250 note 1 This view is only confirmatory of the result of the profound study of the Apodidæ by Bernard. (The Apodidæ; Nature Series, 1892.)

page 250 note 2 See Brooks' beautiful Memoir on Salpa, with its suggestive theory of the origin of the bottom faunas of the ocean and the early geologic faunas. The Genus Salpa, Memoirs from the Biological Laboratory of the Johns Hopkins University, ii. 1893, pp. 140–177.Google Scholar

page 250 note 3 “Nature,” 1893, vol. xlviii. p. 582.Google Scholar

page 251 note 1 The appendages of Triarthrus are replaced by iron pyrites, and are usually well preserved. The specimens of Calymene and Ceraurus from the Trenton Limestone of Trenton Falls, N.Y., were replaced by calcite, and in them there were preserved even more delicate parts than I have yet observed in Triarthrus. Thin sections were made of the latter and photographs obtained by transmitted light, that were used in illustrating the paperinthe Bulletin of the Museum of Comparative Zoology, vol. viii. 1881.Google Scholar