:$2 Ritte r-Zähony, Die Chätognathen. 



2G. - - Chaetognatha from the Coasts of Ireland. Fisheries, Irelaiul, Sei. luvest. 1910, IV, (1910). 



27. Steinhaus, 0. Die Verbreitung der Chätognathen im südatlantischen und Indischen Ozean. Inaugural- 



dissertation. Kiel 189G. 



28. Strodtmann, S. Die Systematik der Chätognathen etc. Arch. Naturg. Jahrg. 58, Bd. 1; 1892. 



29. V er rill, A. E. Report on the Invertebrate Animals of Vineyard Sound and adjacent Waters, with an 



Account of the Physical Characters of the Region. Rep. U. S. Fish. Comm. for 1871/72. Washington 

 1873. 



30. - - Results of the Expedition made by the Steamer Albatross ,off the Northern Coast of the United States in 



1883. Ibid. Rep. for 1883, Appendix. Washington 1885. 



31. Wilms, R. Dissertatio inauguralis de Sagitta mare Germanicum circa insulam Helgoland incolente. 



Berlin 1846. 



