Caption title.

Includes 47 albumen prints of photomicrographs each on a printed card mount, most with gold border and combined manuscript and printed caption that includes magnification, type of microscope, and photo-micrographic negative number.

Health Sciences Library copy lacks 40 plates. Available are plate nos. 1, 3, 4, 5, 6, 7, 8.

"Memorandum on Pleurosigma angulatum and Pleurosigma formosum" by J.J. Woodward inserted.

Each mount stamped with "War Department, Surgeon General's Office, Army Medical Museum, Washington, D.C."