 Despite this, a formal connection to mainland Southeast Asia and the suggestion of an initial population of Australomelanesoids was not suggested until 1952 by Koenigswald in his response to Hooijer, who sharply criticized the attribution of 'big toothed' dental remains to early Australo-Melanesians.The immigration hypothesis proposed by Koenigswald was formally termed the 'Two Layer' model by Jacob Teuku.In 1967, Teuku analyzed the cranial and dental proportions of 152 adult skeletal samples recovered from prehistoric sites in Malaysia and Indonesia, the majority displaying robust jaws and teeth, prominent glabellae, and slender, elongated limbs.