1853. 
Hincks: Further Notos on Brit. Zoopliytes. — Ann. Mag. Nat. 
Hist. Ser. 2. Vol. XI. 
1866. —: On nevv British Hydroids. — ibid- Ser. 3. Vol. XVIII. 
1868. —: A History of tlie British Hydroid Zoophytes. 
1874. —: On Deep-wator Hydroida from Iceland 1 ). — Ann. Mag. Nat. 
Hist. Ser. 4. Vol. XIII. 
1838. Johnston: A History of British Zoophytes. Ed. I, Edinb. 
1847. —: do. Ed. II, London. 
1907. Jaderholm: Zar Kenntniss der Hydroidenfauna des Berings- 
meeres. — Arkiv for Zoologi. Bd. 4. No. 8. 
1908. —: Die Hydroiden des Sibir. Eismeeres. — Mém. de l’Acad. Imp. 
des Sciences. Set. Pétersbourgh. 
1909. —: Hydroiden. — Northern and Arctic Invertebrates of the Svvedish 
State Museum. 
1884. Kirchenpaue r: Nordische Gattungen und Arten von Sertulari- 
den. — Abhandl. Naturwiss. Verein, Hamburg VIII. Part 3. 
1911. Kramp : Report on the Hydroids. — Danmark-Expeditionen til 
Grønlands Nordøstkyst 1906—1908. Bd. V. Nr. 7. — Meddelelser 
om Grønland XLV. 
1836. Lamarck: Histoire naturelle des Animaux sans Vertébres. Tome 2. 
1816. Lamouroux: Histoire de Polypiers coralligénes flexibles. — Caen. 
1892. Le vins en: Meduser, Ctenophorer og Hydroider fra Grønlands Vest¬ 
kyst. — Vidensk. Meddel. Naturh. Foren. København for 1892. 
1913. —: Systematic Studies on the Sertulariidae. — Ibid. Bd. 64. 
1911. Linko: Hydraires I. Faane de la Russie. Set. Pétersbourgh. 
1912. —: Hydraires II. ibid. 
1747. Linné: Fauna Suecica. 
1767. —: Systema naturae, Ed. XII. 
1886. v. Lorenz: Polypomedusen von Jan May en. — Die osterreichische. 
Polarstation Jan Maven. Beobacht. Ergebn. III Band. Wien. 
1842. Mac Gillivray: Catal. marine Zoophytes Aberdeen.—Ann. Mag 
Nat. Hist. Ser. 1. Vol. IX. 
1878. Mereshkowsky: Studies on the Hydroida. — Ann. Mag. Nat. 
Hist. Ser. 5. Vol. I. 
1901. Nutting: The Hydroids. — Papers from the Harriman Alaska 
Expedition XXL — Proceed. Washington Acad. of Sciences. Vol. III. 
1904. —: American Hydroids. Part II. Sertularidæ. — Smithsonian Instit. 
U. S. National Museum. Washington. 
1766. Pal las: Elenchus Zoophytorum. — Hagae Comitum. 
1910. Ritchie: Hydroids trom Christmas Island, Indian Ocean. — Proceed. 
Zool. Soc. London. 
1873. Sars, G. O.: Bidrag til Kundskaben om Norges Hydroider. — 
Vidensk. Selsk. Forhandl. Ivristiania. 
1851. Sars, M.: Beretning om en.zoologisk Reise i Lofoten og Fin¬ 
marken. — Nyt Magazin for Naturvidensk. 6. Bd. 
q* 
o 
9 In reality from Frederikshaab in Greenland. 
