Note 2025 — LETTER XXXV. (continued 3)
Reading edition
Plate XXVII. Fig. 21. s´´´. M. Savigny (Anim. sans Vertèbr. 1. i. 46. Note b.) seems to think that this structure obtains in all his Apiropods; viz. the Octopod Aptera, Arachnida, and Myriapoda: but it seems to me evident only in the two tribes mentioned in the text.