VI. Observations on the orifices found in certain poisonous snakes, situated between the nostril and the eye. By Patrick Russell, M.D. F. R. S. With some remarks on the structure of those orifices ; and the description of a bag connected with the eye, met with in the same snakes. By Everard Home, Esq. F. R. S

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Abstract
In the description of the Fer-de-lance or yellow snake of Martinico, the Count de la Cepede has remarked an orifice on each side of the head, between the nostril and the eye, which had by some naturalists been conceived to be the external organ of hearing; but, not having an opportunity himself to ascertain the fact by dissection, he recommends it as an interesting object of future investigation. I have, in the course of the last three years, received two colubers from Java; and, by favour of Dr. Clark, two from Martinico; all four venomous, and distinguished by lateral orifices. In the month of January, 1803, Dr. Garthshore presented me with a specimen of the yellow snake of Martinico, in excellent preservation.

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