Account of a peculiarity in the distribution of the arteries sent to the limbs of slow-moving animals; together with some other similar facts. In a letter from Mr. Anthony Carlisle, Surgeon, to John Symmons, Esq. F. R. S

This peculiarity was first observed in the axillary arteries and in the iliacs of the Lemur tardigradus, which at their entrance into the upper and lower limbs were found to be suddenly divided into a considerable number of equal-sized cylinders, which occasionally anastomosed with each other, and were regularly distributed on the muscles; whilst the arteries proceeding to the other parts of the body divided in the usual arborescent form. Upon prosecuting this inquiry, it was found that the Bradypus tridactylus, and in some measure also the didactylus, has a similar distribution of these arteries.