Four hundred interactions of cosmic ray nuclei of Z?8 in nuclear emulsion have been studied. The nuclei have E≳7.5 Gev/n and a mean energy of 21 GeV/nucleon. The mean meson multiplicity is 11.9 for these nucleus‐emulsion collisions compared to 6.0 for proton‐emulsion interactions at 22.5 GeV. The angular distributions of emitted particles show some interesting effects. There is a statistically significant excess of mesons emitted in close pairs and groups with separation angles <5 °. One to two percent of the interactions also show meson emission in ’’fans’’ or ’’jets.’’