Volume 2

Dissertations relative to the natural history of animals and vegetables / Translated from the Italian of the Abbe Spallanzani ... To which are added two letters from Mr. Bonnet to the author.

  • Spallanzani, Lazzaro, 1729-1799.
Date:
1784
Catalogue details

Licence: Public Domain Mark

Credit: Dissertations relative to the natural history of animals and vegetables / Translated from the Italian of the Abbe Spallanzani ... To which are added two letters from Mr. Bonnet to the author. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    the middle, and fo on. Four fuch tadpoles are represented in Fig. 5. at A B C D. XXXIX. The tadpoles of this fpecies re- quire great attention. They mult be kept, not merely in clean water, but in that which is taken from the places where the males and females meet, as from ditches and puddles (XX). This precaution was not abfolutdy neceffary for other frogs and toads ; well water being Sufficient in thefe cafes. CHAP. III. GENERATION OF THE TO AD,DENOMINAT- ED by Roesel, Bufo terrestris DORSO TUBERCUL1S EXASPERATO, OCULIS RUBRIS. XL.^TpHOUGH Roefel mentions but X one fpecies of this ugly and dif- gufting animal, I incline to believe, that in this country there are two; this opinion is founded on a difference in the external'con- figuration ; not to mention a difference in co- lour, fome having their backs and Sides of a light cineritious hue, with tubercles of a tan colour, and others of a pale green, with tu- bercles of a dark red. But notwithstanding this difference, I Shall Speak of them as one fpecies, for in what relates to generation, there is the moft perfect limilitude. ' - XLI.