On Pharetrospongia Strahani, Sollas, a fossil Holorhaphidote Sponge from the Cambridge 'Coprolite' bed

Autor: W. J. Sollas
Rok vydání: 1877
Předmět:
Zdroj: Quarterly Journal of the Geological Society. 33:242-255
ISSN: 0370-291X
DOI: 10.1144/gsl.jgs.1877.033.01-04.17
Popis: In the collection of Cambridge-Greensand fossils exhibited in the Woodwardian Museum, Cambridge, may be seen some rather large and irregular fossil sponges bearing the name of Chenendopora , sp. These are the sponges referred to under this name by Mr. Bonney, in his Text-book of Cambridgeshire Geology (p. 41), and included, also with the same generic designation, by Mr. Jukes-Browne in the lists of fossils given by him at pages 311 and 313 of his paper “On the Relations of the Cambridge Gault and Greensand.” The responsibility for the name rests, however, solely with the Museum authorities, the authors cited having simply quoted from the labels attached to the specimens in the Museum, the correctness of which they naturally took for granted. Why the sponge is named “ Chenendopora ” I do not know; certainly it does not possess the characters of that genus as founded by Lamouroux, nor does it correspond with any of the subsequently described species of the genus with which I am acquainted; it is, though long known to Cambridge collectors as an abundant form, an undescribed species, and, from the very important features it presents, merits a detailed investigation. Outer Form .—The Sponge consists essentially of a somewhat thick plate, which, by folding in various ways, and by uniting with itself wherever its sides are folded into contact, gives rise to a great diversity of forms; thus it is sometimes merely a curved plate, sometimes more or less cup-shaped, while often it is contorted into an intricate pattern, which
Databáze: OpenAIRE