Hartlaub,Clemens Cornelius. — Die Comatuliden.

Cambridge, 1912. Pages 277- 491,[18]. 10 lithographed plts. & 8 b./w. plts. Rebound in hardcover (red cloth, gilted title on spine). (Memoirs of the Museum of Comparative Zoo¨logy at Harvard College, Vol. 27, no. 4 - Reports on the results of dredging under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78), in the Caribbean Sea (1878-79), and along the Atlantic coast of the United States (1880), by the U.S. Coast survey steamer 'Blake', XLV).