a notary's box, a place where scribes could keep their materials (see Molina)
IPAspelling:
toːtolɑːkɑtekomɑtɬ
Alonso de Molina:
totolacatecomatl. caxa de escriuania. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 150v. col. 1. Thanks to Joe Campbell for providing the transcription.