CTENOPHORA. 



83 



Will. Lundbeck. — On the "Danmark" Expedition it was observed in September 1907 at the 

 "Skibshavn" (76°47'N., i8°26'W.) in considerable numbers and in different sizes. 



This species is distributed over the whole of the Northern Atlantic, from Spitzbergen and 

 Greenland down along the American Coast to the Gulf of Georgia, at least, and on the European 

 side to the Danish and British Seas, and most probably to the Mediterranean. From the Bering-Strait 

 it is known through Mertens, so that it is evidently circumpolar. Regarding its vertical distribution 

 Damas & Koefoed (Op. cit. p. 415) state that it goes beyond a depth of 200"'. 



5. Beroe CUCUmis Fabricius. 



Bcroe ciiciimis. O. Fabricius. Fauna groenlandica. 1780. p. 361. 



— — .^ O. Fabr. M. Sars. Beskrivelser eg lagttagelser . . . 1835. p. 30. PI. 6. Fig. 15 a — d. 

 Idyia roseola. L. Agassiz. Contributions Nat. Hist. U.S. America. II. i860, p. 270 — 288. PL I — II. 



— — Agass. A. Agassiz. North American Acalephae. 111. Cat. Mus. Conip. Zool. II. 1865. p. 36. 

 ? — cyathina A. Agass. — Ibidem, p. 38. 



? Idy apsis Clarkii Aga.ss. — Ibidem, p. 39. 



Beroe ovata IS.schsch. Chun. Ctenophoren d. Golfes v. Neapel. 1880. p. 308. Taf. XIV. Figs. 1—2. 



— cucumis Fabr. — Ctenophoren d. Plankton-Expedition. 1898. p. 26. 



— ovata Bosc. — Ibid. p. 26. 



— cuctimis Fabr. Vanhoffen. Die gronlandischen Ctenophoren. Bibl. Zool. VIII. H. 20. 1895. p. 20. 



— — — — Ctenophoren. Nordisches Plankton. 1903. XL p. 7. 



— — — Romer. Die Ctenophoren. Fauna Arctica. III. 1903. p. 81. 



— ovata Bosc. — Ibidem, p. 84. 



— — Eschsch. Moser. Die Ctenophoren d. Siboga-Expedition. 1903. p. 20. 



— cucumis Fabr. — Ibidem, p. 21. 



— ovata Bosc. — Japanische Ctenophoren. 1908. p. 22. 



— cucumis Fabr. — Ibidem, p. 23. 



— — — — Ctenophores de la Bale d'Amboine. Rev. Suisse de Zool. 16. 1908. p. 10. 

 , — — — — Ctenophoren d. deutschen Siidpolar-Exped. 1909. p. 154. 



?— Clarki h. Agass. — Ibidem, p. 157. Taf. XXI. Fig. 16— 17. 



The question about the possible identity of Bcroe cucumis Fabr. and the Mediterranean />'. ovata 



Bosc. was raised by Vanhoffen. In his paper "Die gronlandischen Ctenophoren" (p. 20) he says: 



"Die kraftigere Bcroe ovata der warmeren Meere mag, bis weitere Untersuchungen vorliegen, als 



eigene Art gelten, da ich kein gemiigendes Vergleichsmaterial habe, diese Frage zu entscheiden, 



obwohl ich mir nicht verhehlen kann, dass der von Chun (Ctenoph. Golfes Neapel, p. 305) zwischen 



B. ovata und B. roseola (= cucumis) angegebene Unterschied, das Fehlen eines Gefassnetzes auf der Magen- 



wand von B. roseola nicht stichhaltig ist. Sowohl bei der gronlandischen Bcroe wie auch bei den Exem- 



plaren von Kiel habe ich die die Magenwand umspannenden Aste der von den Meridionalgefassen 



ausgehenden Prolifikationen nachweisen konnen". 



Objecting to this cautious suggestion of the possible indentity of the two species Chun (Die 



u* 



