Abstract
Micrabacia coronula, Goldfuss, sp., called Cyclolites by William Smith (1816), is a characteristic fossil of the Upper Greensand, and has been found at Warminster and, according to W. Smith, at Chute Farm and Paddle Hill, near Dunstable, and in the beds at Essen and Le Mans; it is also found in the “Cambridge Greensand.” Bolsche has described a Micrabacia from the Senonian. The external characters of the species have been beautifully delineated by Milne-Edwards and Jules Haime, in their monograph of the British Fossil Corals , and the description of the specimen used as a type is, as might be anticipated, careful and correct. Allowing for variation in some parts, the description permits any specimen to be recognized, specifically, from the appearance of the external structures. It does not appear that these authors made sections of this coral, and as their work was classificatory and not necessarily morphological, they probably did not think it necessary to investigate the internal structures specially. The generic diagnosis of the type was also carefully given by Milne-Edwards and Jules Haime, and the genus Micrabacia was separated from the genus Fungia , Dana, by them. They placed the genus in the family of Aporose Corals called Fungidæ by Dana, and in their own subfamily Funginæ, which includes Fungidæ with perforated walls. The generic and specific diagnoses and the synonymy are given in the ‘Histoire Naturelle des Coralliaires,’ vol. iii. p. 29. After the careful descriptions of these authors had appeared, came the work of M. de
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Quarterly Journal of the Geological Society of London
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.