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II.—On the Jaw Apparatus of Discoidea cylindrica (Lamarck)

Published online by Cambridge University Press:  01 May 2009

Herbert L. Hawkins
Herbert L. Hawkins
Affiliation:
Mark Stirrup Scholar in the University of Manchester.
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Extract

Whilst searching through the duplicate drawers in the Manchester Museum I found recently a specimen of Discoidea cylindrica which contained the dental apparatus in a very good state of preservation. The softness of the matrix within the test made it possible to develop and extract the jaws, and thus to detect several new features of interest.

Type
Original Articles
Information
Geological Magazine , Volume 6 , Issue 4 , April 1909 , pp. 148 - 152
Copyright
Copyright © Cambridge University Press 1909

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References

LITERATURE REFERRED TO

1874. Wright, T.. Monogr. Brit. Foss. Echinodermata.— Cretaceous: I. Echinoidea; pt. vi, Echinoconidæ, pp. 198–213, pis. xlv–xlvii. (Presence of jaws asserted without proof.)Google Scholar
1886. Duncan, P. M.. “On the Perignathic Girdle of the Echinoidea“: Journ. Linn. Soc. Zool., vol. xix, pp. 179–212, pls. xxx, xxxi. (Terminology of perignathic girdle.)Google Scholar
1888. Lovén, Svex. “On a recent form of the Echinoconidæ”: Bihang Kongl. Svenska Vet. Akad. Handl., Bande xiii, Afd. iv, No. x, Stockholm. (Describes one form of girdle in D. cylindrica.)Google Scholar
1889. Duncan, P. M. & Sladen, W. P.. “Note on Perignathic Girdle of D. cylindrica”: Ann. Mag. Nat. Hist., ser. vi, vol. iii. (Expresses disbelief in the existence of jaws in this genus.)Google Scholar
1890. Duncan, P. M. & Sladen, W. P.. “On the Anatomy of the Perignathic Girdle of D. cylindrica”: Journ. Linn. Soc. Zool., vol. xx, p. 48.Google Scholar
1892. Lovén, Sven. “Echinologica”: Bihang Kongl. Svenska Vet. Akad. Handl., Bande xviii, Afd. iv, No. i, Stockholm. (Describes jaws of D. cylindrica.)Google Scholar
1909. Bather, F. A.. “The Triassic Echinoderms of Bakony.” (Terminology of Echinoid jaws discussed.)Google Scholar