Thursday, July 27, 2006

The Anatomy of a Pygmie

"I take him to be wholly a Brute, tho' in the formation of the Body, and in the Sensitive or Brutal Soul, it may be, more resembling a Man, than any other Animal; so that in this Chain of the Creation, as an intermediate Link between an Ape and a Man, I would place our Pygmie."


“one would be apt to think, that since there is so great a disparity
between the Soul of a Man, and a Brute, the Organ likewise in
which ’tis placed should be very different too.”






[click for full size versions]

Edward Tyson (1650–1708) was an English physician and member of the Royal Society. Beyond his medical duties and publications (both of which were significant and extensive) he had a deep interest in comparative anatomy, an area of scientific investigation in which he is one of the leading early protagonists.

In 1680 he had already outlined this interest in 'Phocaena or the Anatomy of the Porpess' in which he not only systematically described cetacean structures but also wrote of "the importance of a comparative approach to anatomy and attempts to develop a plan for a natural history of animals." He performed dissections on many different species and published his findings in the 'Philosophical Transactions of the Royal Society'.

In the late 1690s a chimpanzee had only been seen illustrated in Europe once previously and the larger apes such as the orangutan and gorilla were not discovered or described until the 18th and 19th centuries respectively. It was not surprising therefore that Tyson was given the opportunity to dissect a chimpanzee that had been brought over from Africa in 1698.

The chimpanzee was a juvenile (which led to some erroneous anatomical statements) and was injured on board its transport ship. The injury later became infected and caused the chimp's death. This injury is either directly or inadvertently represented in the engraving above (all the drawings were done by the anatomist William Cowper) in which the bipedal chimp is seen using a walking stick. Tyson described the animal as quadru-manous to distinguish it from the quadrupeds.

The reference to 'Orang-Outang' in the title is only in terms of it meaning "man of the woods" [homo silvestris]. So it was that 'The Anatomy of a Pygmie' marked the beginning of primatology, and there is some irony in Tyson having been a distant cousin of Charles Darwin. I haven't searched around but I would not be surprised to learn that the expression 'the missing link' derives from Tyson's meticulous documentation of the anatomical comparison between chimpanzees and man.

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