Philipp L.S. Müller edited Th. 1-3 of the text; M. Houttuyn edited Th. 4-6 of the text Theil 2-6 have title: Vergnügen der Augen und des Gemüths : in Vorstellung einer allgemeinen Sammlung von Schnecken und Muscheln, welche im Meer Gefunden werden Parts 1-2 of atlas have title: Collection des differentes espèces de coquillages qu'on trouve dans les mers rassemblée & communiquée au public par George Wolgang Knorr Parts 3-6 of atlas have title: Collection des differentes especes de coquillages qu'on trouve dans les mers rassemblée & communiquée au public par las heritiers de George Wolgang Knorr Theil 1-6 dated 1757, 1764, 1768, 1769, 1771, 1772 respectively Pagination: [4], 39, [1] p.; zweyter Theil: 56, [16] p.; dritter Theil: 52 p.; vierter Theil: 48, [16] p.; fünfter Theil: 46, [2] p.; sechster Theil: 76, 18, [2], 11, [1], 100 p. (Page 43 (F2) misnumbered 34) Plates numbered: [1], I-XXX, [1], I-XXX, [1], I-XXX, [1], I-XXX, [1], I-XXX, [1], I-XL Plates are hand-colored Woodcut head- and tail-pieces, initials Signatures: pi²A-E, ²A-Ga-b, ³A-FG², A-F, ²a-b, A-F, A-IK²(a)-(b)(c)²)(2)(²A-MN²(F4 and ²b4 are blank; verso of C2 signed C3) extracted picklist SCNHRB copy (390880134850, 39088013485057) has occasional ink ms. notes and red pencilled ms. markings SCNHRB copy has bookplate of William Healey Dall, Division of Mollusks Sectional Library. Stamped on t.p.: Division of Mollusks Sectional Library SCNHRB copy bound in plain brown library buckram, title in gilt on spine, red edges