gg CTENOPHORA. 



the pleasure of seeing it catching the latter in the usual way. Of course, the Bolina glided out again 

 the opposite way; — it reminded me of the horse of Miinchhausen! — It being on one of the last 

 days of my stay at the Trondhjem vStation I could not substantiate, whether the specimen thus muti- 

 lated was able to regenerate the lost main part of its body. 



In a pair of the larger specimens caught in the Skagerak I have found Hypcna. one specimen 

 in each. It would seem to be the same parasite, which was observed by Sars (Op. cit. p. 32), though 

 he states that they were always found attached to the combs. 



Specimens of Bcroc citcuinis were taken by the "Ingolf '-Expedition on the following stations: 



Station 11. (64° 34' N. 31° 12' W.) i small specimen. 



— 52. (63° 57' - 13° 32' - ) I - - 



— 80. (61° 02' - 29° 32' - ) I — — 



— 96. (65° 24' - 29° 00' - ) I ,-- - 



— 140. (63° 29' - 6° 57' - ) I large — 



Further a small specimen was taken at 61° 32' N. 10° 47' W. (betwen stations 45 and 46). 

 Besides, the occurrence of Beroids is noted in the Journal of the Expedition at a number of 

 other stations; as, however, it cannot be said with full certainty that these must have been Brroc 

 cucuviis, it has been thought better not to name these stations. Also on the "Danmark" Expedition it 

 was observed at North Ea.st Greenland (75° 7' N. 9° 23' W.) in August 1906, numerous specimens, in all 

 sizes. In March 1907 some large specimens were observed in an opening in the ice, an interesting 

 observation, showing the occurrence of the species under the ice. 



This species has quite a cosmopolitan distribution, occurring in the arctic and antarctic, as 

 well as in the tropical sea.s. Regarding its bathymetrical distribution very little is known. Only 

 Danias & Koefoed (Op. cit. p. 415) state that it extends beyond the depth of 200'"'). 



The following species have been recorded from the North European Seas, but there is no 

 definite proof as yet, that they really occur there. As set forth below (p. 95) it is, however, by no 

 means improbable that the\- — and perhaps some other southern forms — will prove to occur there 

 under certain hydrographical conditions. A few notes may be given on these forms. 



Hormiphora plumosa (M. Sars). Edw. J. Bles in his "Notes on the Plankton observed at 

 Plynioulh duruig June, July, August and vSeptember 1892" (Journ. Mar. Biol. Assoc. II. N. S. 1892. 

 15. 34(j| mentions Hormiphora pliimnsa as "the Ctenophore common at Plymouth". That this is simply 

 a wrong identification of Plairobrnchia pilciis is beyond doubt, as might be concluded from the fact 

 that ho does not mention the latter as occurring there. Dr. E. J. Allen has also kindly informed 

 me that Bles was mistaken herein; Pleiirohrac/i/n pilrus is common at Plymouth, together with 



') The differential catches recorded by R. T. Gi'in ther (Op. cit.) afford no certainty of the depth at which />V;w 



cucuviis (ovata) and other unidentified Ctenophores were taken. The statement that a specimen of Beroi- ovata was taken 



"between 1510 fathoms and the surface" is certainly not of much value. Clo.sing nets alone can give fully reliable results in 

 regard to the bathymetrical distribution. 



