For instance, Sundevall in 1873 (Tentamen, p. 86) placed Glareola among the Caprimulgidae, a position which osteology shows cannot be maintained for a moment.
That each of these sections, except the Cacatuinae, is artificial any regard to osteology would show.
Considering the enormous stride in advance made by L'Herminier, it is very disappointing for the historian to have to record that the next inquirer into the osteology of birds achieved a Berthold.
Most canine experts believe that the dog is descended from the wolf, although zoologists are less certain (see Carnivora); the osteology of one does not differ materially from that of the other: the dog and the wolf breed with each other, and the progeny thus obtained will again breed with the dog.
The treatise of Kessler on the osteology of birds' feet, published in the Bulletin of the Moscow Society of Naturalists for 1841, next.
Although the present article does not discuss mammalian osteology in general (for which see Vertebrata), it is interesting to notice in this connexion that the primitive condition of the mammalian tympanum apparently consisted merely of a small and incomplete bony ring, with, at most, an imperfect ventral wall to the tympanic cavity, and that a close approximation to this original condition still persists in the monotremes, especially Ornithorhynchus.
Two other points in connexion with mammalian osteology may be noticed.
Of birds, and he seems to have been the first to institute a direct comparison of their skeleton with that of man; but in this respect he only anticipated by a few years the more precise researches of Volcher Coiter, a Frisian, who in 1573 and 1575 published at Nuremberg two treatises, in one of which the internal structure of birds in general is very creditably described, while in the other the osteology and myology of certain forms is given in considerable detail, and illustrated by carefully drawn figures.