Saccoglossus kowalevskii by Spengel 1893

1. Ptychodera clavigera, from the dorsal side. 1 / l. From life. 2. Ptychodera minuta q 1 , from the ventral side. 2 /i- from life. 3. Same q, from the dorsal side. 2 /j. From life. 4. Ptyclwdera erythraea, from the dorsal side. Vi- from the available fragments of the only specimen preserved in spirit. 5. Scmzocardium brasiliense, from the side. From life. 6. Glandiceps talaboti. Forebody, from the dorsal side, '/i* from life. 7. Glandiceps haeksi, adult, forebody from the ventral side. Vi- from the spirit specimen before me. 8. The same specimen from the dorsal side. 9. Young individual of the same species. 2 /i- after a spirit specimen. 10. Balanoglossus jcoicalevskii. 4 /i- from life. 11. Balanioglossus hupfferi. I / i. From life. The originals for fig. 2, 3, 4, 7, 8 were made by mr. O. Peters in göttingen, for fig. 5 by prof. E. Selenka in erlangen, for fig. 6 by mr. Merculiako in naples, for fig. 10 by prof. Charles s. Minot in boston, for fig. 1, 9 and 11 by me. Date: 1893.