An edition of Reports on the results of dredging, under the direction of L. F. Pourtalès, during the years 1868-1870 (1887)

Reports on the results of dredging, under the direction of L. F. Pourtalès, during the years 1868-1870

and of Alexander Agassiz in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1878-79), in the U.S. Coast Survey steamer "Blake," Lieut.-Com. C. D. Sigsbee, U.S.N., and Commander J. R. Bartlett, U.S.N., commanding : 31 : Report on the annelids

By Ernst Ehlers