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1908. Peron & Lesueur Tableau des caracteres generiques et specifiques de toiites les especes de Meduses connues jusqn'a ce jour. 



— Ann. Mus. d'Hist. Nat. Tome 14. Paris. 

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for 1876. Vol. 166. 

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1911. SEemundsson, B. Bidrag til Kimdskaben oni de islandske Hydroider, II. — Vidensk Meddel Naturhist. l"oren. for 1911. 



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 1863. — Geologiske og zoologiske lagttagelser, anstillede paa en Reise i en Deel af Trondhjems Stift i Sommeren 1862. — Ibid. 1863. 

 1854. Stinipsou, \Vm. Synopsis of the Marine Invertebrata of ("rand Manan. — Smithsonian Contributions to Knowledge Vol. VI. 



Washington. 

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 1856. — The Natural History of Ireland — Vol. IV. London. 



190Q. Torrey, H. B. The Leptomedusae of the San Diego Region. — Universitv of California Public, in Zoology, \'ol. 6. No. 2. 

 1S97. Vanhiiff en, E. Die Fauna und Flora Gronlands. — • Gronland-Expedition der C.esellschaft fiir lirdkunde zu Berlin 1891 — 1893, 



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1912. — Die craspedote Medu.sen der Deutsche Siidpolar-Iixpedition. — Deutsche Siidpolar-Exped. Bd XIII. Zool. V. 

 1871. Verrill, A E. Marine Fauna of Ea.stport, Me. — Bull. Essex Institute. Vol. III. Salem, Mass. 



1875. — Results of Dredging E-xpeditions off the New I^ngland Coast in 1874. — The .American Journ of Science and .Arts Ser. 3. 



Vol. X. New Haven. 

 1885. Wagner, N Die Wirbellosen des Weissen Meeres. Bd. I. — Leipzig. 

 1880. Winther, G. Fortegnelse over de i Danniark og dets nordlige Bilande fundne hydroide Zoophyter — Naturhist Tidsskrift. 



3. R. Bd 12. Copenhagen. 

 1861. Wright. T. Strethill. Observations on British Protozoa and Zoophytes — .Ann. Mag. Nat. Hist. Ser 3. Vol VIII. 

 i8(>3. — do. do. — Proceed. Royal phys. Soc. Edinb. Vol. II. 

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Errata. 



Page 19, line 29 stands: stat. 241 (09). read: stat. 241 (04', 



— 46, line 17 stands: sout, read: south. 



— 59, text, line 3 stands: (1905), read: (19091. 



— 85, text, line- 4-5 stands: textfig. 14, read: textfig. 15. 



