Note 5 — Chapter I · THE THRESHOLD OF BACKBONED LIFE.
Reading edition
For this drawing, and also those of Figures 1 and 4, I am indebted to Professor A. C. Haddon; the larval form A is the young of Clavelina, found at Torquay.
Reading edition
For this drawing, and also those of Figures 1 and 4, I am indebted to Professor A. C. Haddon; the larval form A is the young of Clavelina, found at Torquay.