Recently Maciel and coworkers reported carbon-13 chemical shift assignments for a number of benzocycloalkenes. The coherent H spin decoupling technique was employed for assignments in indan, benzocyclobutene, benzocyclopropene, and o-di-Zert-butylbenzene, but this necessitated acceptance of the previously reported H aromatic assignments, in no case established. In view of the great interest in the effects of strain on spectroscopic (and other) properties and the use of hydrocarbon data to test theories of nuclear shielding, the need for reliable C data is clear. We wish to report such data.