Addendum

For more examples of the neuter plural to animate singular—the locus ~ loca phenomenon—in Hittite alluded to on pg. 211 fn 24 see Melchert 2000:62–4.

Melchert, H. Craig. 2000. Tocharian Plurals in -nt- and Related Phenomena. Tocharian and Indo-European Studies 9.53-75.