London, Benjamin White., 1777. 8vo (20.5 x 12.9 cm). Engraved title page with molluscan vignette, xviii, 154 pp.; 93 finely engraved plates [numbered I-XCII, IX.A]. 20th-century buckram with gilt title on the spine.

This is the complete Volume IV in the final edition with the Crustacea (Plates I-XVIII), worms (including several nudibranchs) (XIX-XXVI), Cephalopoda (pls. XXVII-XXXI), echinoderms (XXXII-XXXVIII), barnacles (XL-XlI), and shells (XXXVIII-XCII), ascidians, and more worms (XXV-XXVIII, XCIV-XCV). Uncut. The total number of Mollusca plates is 60 (including one shared). Plate XXVI is erroneously numbered XXV. Plate XLIII, depicting the only fish, is added in photocopy. Tipped in, also in photocopy, is Tom Iredale's collation of this work, published in the Proceedings of the Malacological Society of London. Some occasional light spotting, otherwise a very good clean copy. Nissen IVB 710. Not in Caprotti.