ðeɪ vˈɛɹi fɹʌm sˈɪksti tʊ ˈeɪɾi ɪn nˈʌmbɚ, lˈaɪ sˈaɪd baɪ sˈaɪd, ænd mˈeɪ biː dᵻvˈaɪdᵻd ˌɪntʊ lˈɑːɹdʒ ænd smˈɔːl; ðə fˈɔːɹmɚɹ ɑːɹ ɐbˌaʊt tˈuː.fˈaɪv ˌɛmˈɛm.
They vary from sixty to eighty in number, lie side by side, and may be divided into large and small; the former are about 2.5 mm.