Note 422 — LETTER XXII.
Reading edition
De Geer, vi. 395—. Plate XXIII. Fig. 7. Foreleg, a. Hind-legs, bb. Mr. W. S. MacLeay is of opinion that these legs are pedunculated spiracles, (Philos. Mag. N. Series, No. 9. 178.) but it is evident from De Geer's account that the animal uses them as legs, and like legs they are armed with hooks or claws.