394 P- Kramp. 



Geographical distribution: Arctic: circumpolar. — West 

 coast of Europe as far as Bay of Biscay ; North Sea, Kattegat ; North 

 America, Athintic and Pacific. — Antarctic. 



Not earher known from East Greenland. 



LITERATURE. 



1. Alder, J.: A Catalogue of the Zoophytes of Northumberland and Durham. — Trans. 



of the Tyneside Naturalists' Field Club. Vol. III. 1856. 



2. — Descriptions of three new Sertularian Zoophytes. — Ann. nat. hist. Ser. 3. Vol. 



III. 1859. 



3. — Descriptions of a Zoophyte and two Species of Echinodermata new to Britain. 



— Ann. nat. hist. Ser. 3. Vol. V. 1860. 



4. Allman, G. J. : Notes on the Hydroid Zoophytes. — Ann. nat. hist. Ser. 3. Vol. IV. 1859. 



5. — On the Construction and Limitation of Genera among the H3'droida. — Ann. 



nat. hist. Ser. 3. Vol. XIII. 1864. 



6. — A Monograph on the Gymnoblastic or Tubularian Hydroids. 1871. 



7. — Report on the Hydroida collected during the Expeditions of H. M. S. „Porcupine". 



— Trans. Zool. Soc. London. Vol. VIII. 1874. 



8. — Report on the H3'droida collected during the exploration of the Gulf-Stream. — 



Mem. Mus. Comp. Zool. Harvard College. Vol. V. No. 2. 1877. 



9. — Report on the Hydroida dredged by H. M. S. „Challenger". Part II. — Challen- 



ger Reports, Vol. XXIII. 1888. 



10. Billard, A.: De la stolonisation chez les Hydroides. — С. R. Acad. sei. 133. 1901. 



11. — Hj'droïdes. — Expéd. scient, du „Travailleur" et du „Talisman". 1907. 



12. BoNNRviE, Kr: Neue norwegische Hydroiden. — Bergens Museums Aarbog. 1898. 



13. — HA'droida. — Norske Nordhavsexpedition, 7de Bind. 1899. 



14. Broch, Hj.: Die von dem norwegischen Fischereidampfer „Michael Sars" in den Jah- 



ren 1900—1902 in dem Nordmeer gesammelten Hydroiden. — Bergens Museums 

 Aarbog. 1903. 



15. — Nordsee-Hydroiden, von „Michael Sars" in 1903 — 1904 gesammelt, nebst Bem. 



über die Systematik der Thecaphoren Hydroiden. — Bergens Museums Aarbog. 1905. 

 16- — Hydroiduntersuchungen I. Thecaphore H^^droiden von dem nördlichen Norwegen, 

 nebst Bem. über die Variation und Artsbegrenzung der nord. Lafoëa-Arten. — 

 Tromsø Museums Aarshefter 29. 1906. 



17. — Die Hjdroiden der arktischen Meere. — Fauna arctica. Bd. V. Lief. 1. Jena 1909 



18. VON Campenhausen, В.: H3'droiden von Ternate. — Abhandl. der Senkenbergischen 



naturforschenden Gesellschaft. Bd. XXIII, Heft 2. 1896. 



19. Cerfontaine, p.: Recherches expérimentales sur la Régénération et l'Hétéromorphose 



chez Astroïdes Calijciilaris et Pennaria Cavolinii. — Archive de Biologie, Tome 

 XIX, Liège 1902. 



20. Clark, S. F.: Report on the Hydroids collected on the coast of Alaska and the Aleu- 



tian Islands. . . from 1871 to 1874. — Proc. acad. nat. sciences of Philadelphia 1876. 



21. Ellis &Solander: The natural history of man\' curious and uncommon Zoophytes... 



1786. 



22. Gast, R & Godlewski, E. : Die Regulationserscheinungen bei Pennaria Cavolinii. — 



Archiv für Entwickelungsmechanik der Organismen. Bd. XVI, Heft 1. Leipzig 1903. 



