Haskell 21A and 25.
Includes bibliographical references (p. 725-729) and index.
"By authority of Congress"--Half-title p., text; t.p., atlas.
Text vol. has half-title: United States Exploring Expedition.
Atlas lacks series vol. designation.
Publisher's statement on atlas varies slightly.
Edition of 100 copies.
"The subject of corals, in this volume, is treated exclusively in a zoological point of view. The geological questions with regard to the formation and structure of coral-reefs and islands, will come up for discussion in the author's geological report"--Preface, p. iii.
The introductory part (p. [7]-120, 709-720) was also issued separately with title: Structure and classification of zoophytes. Philadelphia, Lea and Blanchard, 1846.
Another ed. was published without the preface (Cf. Haskell, 21B)
Plate no. 27 incorrectly numbered 30.