Fig. 2.

Egg clutches recovered from Rooidrai. (A) Massospondylus (BP/1/5347a) egg clutch, showing the presence of two exposed skeletons; parts of 7 eggs (numbered) are preserved in this block, and fragments of 4 additional eggs are preserved in the counterpart block (BP/1/5347b, not shown). However, only 6 eggs are sufficiently complete to contain embryos. This clutch was collected as an isolated block in talus in 1976. Of the preserved near complete eggs, 5 contain embryonic remains, but only the remains in 2 eggs (N2 and N6) have been exposed through preparation and removal of most of the eggshell. (B) Part of the most completely prepared egg clutch that contains a total of 34 eggs (BP/1/6229). This clutch was preserved in situ in the cliff face. The matrix in the immediate area around the nest showed extensive bioturbation and lacked the fine laminations that normally characterize much of the nesting site, but there is no definite evidence of a nest beyond the organized nature of the egg clutches. (Scale bar, 5 cm.)