Catalog number(s): USNM 17801 Subject: whole specimen at x 18. Artist: Michael, Ellis L. Published: Michael, Ellis L. 1919. Report on the Chaetognatha collected by the United States Fisheries steamer “Albatross” Philippine expedition,1907-1910. Smithsonian Institution. United States National Museum. Bulletin 100 vol. 1, part 4. Plate 34, Fig. 1.