On the light thrown on geology by submarine researches : being the substance of a communication made to the Royal Institution of Great Britain, Friday evening, the 23d February 1844 / by Edward Forbes.

  • Forbes, Edward, 1815-1854.
Date:
1844
Catalogue details

Licence: Public Domain Mark

Credit: On the light thrown on geology by submarine researches : being the substance of a communication made to the Royal Institution of Great Britain, Friday evening, the 23d February 1844 / by Edward Forbes. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Were it not for the law whicli permits of the development of these larvae only in the region of which the adult is a true native, the zones of depth would long ago have been con- founded with each other, and the very existence of the zones of depth is the strongest proof of the existence of the law. Our confidence in their fixity, which the knowledge of the fact that moUusca migrate might at first shake, is thus re- stored, and with it our confidence in the inferences applicable to geology which we draw from submarine researches. Some of the facts advanced in this communication are new, some of them have been stated before : but all, for which no authority is given, whether new or old, are put forth as the results of personal observation. similar in form to the undeveloped shells above alluded to, and it is yet to be seen whether all Cephalopoda do not commence their existence under a spiral-shelled Pteropodom form.