Tegmentum ( Meckel, 1817 ) : The tegmentum (Swanson, 2000) without the cerebral peduncle (Tarin, 1753) white matter tract; see English translation (1832, vol. 2, p. 467), "Haube" in the original German. The Latin "tegmentum" (see Burdach, 1822, p. 101, who used the same definition) means "cap" or "covering" in English, and Meckel described it as such for the cerebral peduncle (Tarin, 1753). Hence the synonym for cerebral peduncle (Tarin, 1753), basis pedunculi (Meckel 1817; see English translation, 1832, vol. 2, p. 467); also see Ranson (1920, p. 158). Unfortunately, basis pedunculi later acquired a second meaning, the cerebral peduncle (Tarin, 1753) together with the substantia nigra (Soemmerring, 1791); see Henle (1871, p. 244), Strong & Elwyn (1943, p. 228), Crosby et al. (1962, pp. 221, 260).