The Great Permian Mass Extinction

1–

1c+2c circle4 & back while{8} 3c+4c+5c set with highland arms | cross RH ; set with highland arms | cross LH

9–

2M & 4W change places by crossing over | casting RSh round 3c while{4} 1M+5W change places passing RSh between 3c ; 5W+1W+4W+2W (top) & 4M+2M+5M+1M (bottom) RHA while{4} 3c turn 1¼ LH

17–

Extended snake pass: 3M,4M,5M,1M,2M dance up W side, across and down M side while{8} 3W,2W,1W,5W,4W dance down M side, across and up W side (M: 2,1,5,4,3; W: 3,2,1,5,4)

25–

All set | all dance up NHJ with opposite person (not P) and cast down (M: 3,4,5,1,2; W: 4,5,1,2,3)

33–

All set | all stand ; 3W (in 5pl) dances up alone to 1pl (other W down on [39–40]) to (3,4,5,1,2)

Longer instructions are at https://my.strathspey.org/u/murrough/GreatPermianMassExtinction.pdf