There is no evidence, so far as we can see, of his having been aware of Merrem's views; but like that anatomist he without hesitation divided the class into, two great " coupes," to which he gave, however, no other names than " Oiseaux normaux " and" Oiseaux anomaux "-exactly corresponding with his predecessor's Carinatae and Ratitae-and, moreover, he had a great advantage in founding these groups, since he had discovered, apparently from his own investigations, that the mode of ossification in each was distinct; for hitherto the statement of there being five centres of ossification in every bird's sternum seems to have been accepted as a general truth, without contradiction, whereas in the ostrich and the rhea, at any rate, L'Herminier found that there were but two such primitive points, 3 and from analogy 1 Their value was, however, understood by Gloger, who in 1834, as will presently be seen, expressed his regret at not being able to use them.
He judged that the same would be the case with the cassowary and the emeu, which, with the two forms mentioned above, made up the whole of the " Oiseaux anomaux" whose existence was then generally acknowledged.
P. Lesson, who had previously (loc. cit.) made some blunders about it, placed it (Traite d'Ornithologie, p. 12), though only, as he says, "par analogie et a priori," in his first division of birds, "Oiseaux Anomaux," which is equivalent to what we now call Ratitae, making of it a separate family "Nullipennes."